Featured Project: Desert Rose International Convention and Exhibition Centre

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Desert Rose International Convention and Exhibition Centre

Desert Rose International Convention and Exhibition Centre

Description
Construction of a commercial component for the Desert Rose mixeduse development. The project will consist of residential, recreational, institutional, commercial and public zoning’s in order to create a multilayered network of activities supporting each other

 

Status Region
Procedural Namibia
Category Value
Building R 100 million+
Industry Timing
Office & Commercial 2017 Onwards
Sector Class
Private Invited/Negotiated

 

Please visit Leads 2 Business for more information on this project
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About Melanie Miles

One girl who would rather wear boots than high heels...

Featured Tender: Revew and Update of NamDeb’s Biophysical Closure Plan and Programmes

posted in: Featured Tender | 0

Revew and Update of NamDeb’s Biophysical Closure Plan and Programmes

Supply, installation and maintenance of standby generators and general electrical reticulation

Contract Number:

E108-ND-2018 – Namdeb Diamond Corporation

Description:

Namdeb Diamond Corporation (Pty) Ltd (Namdeb) is a wholly owned subsidiary of Namdeb Holdings (Pty) Ltd. Namdeb operates diamond mining operations near the towns of Oranjemund and Lüderitz. Namdeb hereby invites reputable and qualified bona fide service providers to submit bids for the Review and Update of Namdeb’s Biophysical Closure Plan and Programmes.

Category Industry
Consultants Mining
Institutional
Region Site Inspection
Namibia 2018-10-23 08:00 AM
Closing Date Contract Period
05 November 2018 at 16:00 (Local Time) No Details

 

Please visit Leads 2 Business for more information on this Tender Notice.
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To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.
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About Sonet Du Plooy

I started working at Leads 2 Business in 2014. I'm currently working in daily Tenders within the Africa department and I Love it!

Industry Events: Smart Procurement World Indaba 2018

Industry Events: Smart Procurement World Indaba 2018 

Construction Events

Event:

Smart Procurement World Indaba 2018

Date:

17 – 20 September 2018

Event location:

Gallagher Convention Centr, Midrand, Johannesburg

Event Description:

The 12th Annual Smart Procurement World conference and exhibition is the ultimate procurement and inbound supply chain conference in South Africa. Meet the buyers from South Africa’s top corporates and government. This is a sourcing exhibition is where you meet sourcing, procurement, purchasing and buying professionals from both government and the private sector. The exhibition will offer you easy access to procurement professionals ensuring that you can learn more about their requirements and meet their needs.

Contact Details:

http://www.smartprocurementworld.com/contact.html

Event Details:

Website
Pre-registration


If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit Leads 2 Business Wiki.
To view more Events, please visit our Leads 2 Business Blog.

About Sasha Anderson

I enjoy making new professional acquaintances and corresponding with existing clients. Reach out if you want to talk, L2B, social media, construction, technology, shoes, dachshunds, popular culture or travel.

What is the difference between opencast & underground mining?

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What is the difference between opencast & underground mining?

Mining is something quite extraordinary. When we think of mining we think dusty, dark, unflattering settings. In contraire it is quite in fact the opposite.

 

So what is open cast mining?

Open cast mining is the removal of rocks or sediments that contains minerals, with economically important elements.

The advantages of open cast mining:
• More cost effective, than shaft mining
• The working conditions are safe for miners, there is no risk of toxic gases or cave ins
• Trucks and mining machinery can move around freely

Have you ever wondered what extraordinary materials are extracted from the open pit mining?

Here are a few:
• Coal – used for electricity generation, steel production, cement manufacturing
• Marble – Used for its beauty in architecture & sculpture
• Granite – Used in countertops, floor tiles, cemetery monuments
• Metal ores – important to industry & trade, like gold, copper & iron
• Diamonds – are known for their durability & lustre. Aside from being a beautifully polished gem, diamonds are also used to cut, grind or drill other materials.

Underground mining uses different underground mining techniques to excavate hard minerals, such as ore which contains, gold, copper, silver zinc. Underground mining not only produces gold, copper & silver but also precious gems like diamonds & rubies.

The advantages of underground mining:
• There are no damages to the surface environment or mine area
• The ground does not require blasting with explosives
• There is a higher production volume
• Cost effective than surface mining

The types of underground mining:
• Room & pillar mining –
• Longwall mining
• Slope mining
• Block caving

Mining is important to the South Africa Economy. Not only is gold one of the biggest exports it also creates one million jobs.

To view more articles, please visit the Leads 2 Business Blog.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.

Sources:
Ritchie Wiki
Born 2 Invest
Wikipedia
Sciencing
EBRD
Brand South Africa

About Meryl Matthew

I started at Leads 2 Business in 2014. I am a friendly, bubbly, enthusiastic person. I am passionate about sales & customer service. My motto "when you know better you do better".

Featured Project: The Halyard

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The Halyard

Karoshoek Solar Valley Development

Description
 Construction of a new R400m mixed-use tower

 

Status Region
Underway Northern Cape
Category Value
Building R 100 million+
Industry Timing
Office & Commercial June 2015 to December 2018
Sector Class
Private Invited/Negotiated

 

Please visit Leads 2 Business for more information on The Halyard Development
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.
To view more articles, please visit the Leads 2 Business Blog.

About Melanie Miles

One girl who would rather wear boots than high heels...

Featured Tender: Construction of Bulk Earthworks and Bulk Services

Construction of Bulk Earthworks and Bulk Services

Bulk Earthworks

Contract Number:

57Q/2018/19 – City of Cape Town

Description:

Tenders are invited to bid on the Construction of Bulk Earthworks and Bulk Services: Coastal Park Integrated Waste Management Facility, City of Cape Town.

 

Category Industry
Infrastructure Road
Water
Institutional
Region Site Inspection
Western Cape 2018-09-17 10:00 AM
Closing Date Contract Period
08 October 2018 at 10:00 No Details

 

Please visit Leads 2 Business for more information on the Construction of Bulk Earthworks and Bulk Services tender.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.
To view more articles, please visit the Leads 2 Business Blog.

About Pauline Rainbird

I have been working at L2B since March 2011 and my current position is Deputy Head of Department - Africa. When I am not working I am either riding my bicycle or spending time with my dogs.

Precious Gems and Stones in South Africa

posted in: Did You Know | 0

Precious Gems and Stones in South Africa

Not the usual blog you would find in our industry. Just a tad different with interesting thoughts and insights you might not have ever thought about before.

All the bright images of these “bling’s” comes to mind from beauty and great riches for so many centuries.
Come to think about it gemstones have long fascinated the human population. Not only to be used as investments by the rich, who used to show off the red rubies, shiny diamonds or the enormous emeralds to display wealth, status and power owned only by the royalty. People have treasured gems for many reasons throughout history.

Believe it not, the gems and stones inspired myths, curses and has been used as medicine before. Religious symbols, amulets and good-luck charms are one of the most known reasons today. Ancient people believed that certain gems would protect them from misfortune, illness and unhappiness. All the gemstones we so greatly treasure and admire come from various depths and locations in the earth’s crust.

I can write forever and a day about all the different stones and gems and all the superstition symbols of hope, luck, and many more. But can’t help myself to name the most obvious.
The number twelve is common in gem lore. Twelve gems that represented the twelve tribes of Israel were set in the breastplate of Aaron, the first high priest of the Hebrews. Among Christians, symbolic gems represented the twelve apostles.

The Twelve Tribes The Twelve Apostles
1. Levi, garnet Peter, (Jasper)
2. Zebulon, diamond Andrew, (Sapphire)
3. Gad, amethyst James, (Chalcedony)
4. Benjamin, jasper John, (Emerald)
5. Simeon, chrysolite Philip, (Sardonyx)
6. Issachar, sapphire Bartholomew, (Sard)
7. Naphtali, agate Matthew, (Chrysolite)
8. Joseph, onyx Thomas, (Beryl)
9. Reuben, sard James the Less, (Topaz)
10. Judah, emerald Judy, (Chrysolprase)
11. Dan, topaz Simon, (Hyacinth)
12. Asher, beryl Judas, (Amethyst)

In addition, gems have long been associated with the signs of the zodiac and with the sun, moon, and planets.

Signs of the Zodiac
Aries the ram, (Bloodstone)
Taurus the bull, (Sapphire)
Gemini the twins, (Agate)
Cancer the crab, (Emerald)
Leo the lion, (Onyx)
Virgo the virgin, (Carnelian)
Libra the scales, (Chrysolite)
Scorpio the scorpion, (Aquamarine)
Sagittarius the archer, (Topaz)
Capricorn the goat, (Ruby)
Aquarius the water bearer, (Garnet)
Pisces the fishes, (Amethyst)

Did you know that the most expensive gemstone ever sold was the Pink Star Diamond that was sold for $83 million? Also known as the ‘Fancy Vivid Pink’ diamond, this stunning gemstone was mined in 1999 in South Africa, with a weight of 59.6 carats. Because of the selling price of $83 million, this diamond became the most expensive gem ever sold.

Did you know that Queen Elizabeth crown that she has worn for 63 years also has a diamond in from South Africa? Weighing a breath-taking 3 106 carats, this diamond was discovered in 1905 by Pretoria’s Premier Mine inspector, Thomas Wells, who initially mistook it as a piece of glass placed by the miners to prank him.
When its identity was revealed, the diamond was named The Cullinan after the owner of the mine and purchased by the Transvaal government as a gift for King Edward VII. Then plans were made to have the precious diamond shipped to England on a boat, always protected by top security. However, it was later revealed to be an elaborate ruse created to fool any hopeful thieves – the Cullinan was in fact sent to England in the mail, with no security whatsoever.
Did you know in 1867 South Africa’s first diamond, later called the Eureka, was discovered on the banks of the Orange River near Hopetown by 15-year-old Erasmus Jacobs. He was playing around on his father’s Northern Cape farm at the time and a pretty transparent rock caught his eye. It was a neighbour, Schalk van Niekerk, who identified this ‘rock’ as a diamond.

So where do gems come from?
Most gemstones are minerals or rocks and occur in favoured sites in the earth’s crust or in the gravels that result from the weathering of rocks. Of the beautifully crystallized minerals that seem useful for gems, only a very few meet the standards and are sufficiently beautiful, durable, rare and large enough to be cut into saleable stones. As a class of natural objects gemstones are exceedingly rare.

About one hundred chemical elements make up the earth. Oxygen and silicon are by far the most plentiful elements in the earth’s crust, and they occur in most minerals. In gemstones, they are major ingredients in amethyst, aquamarine, emerald, garnet, peridot, topaz, tourmaline and zircon. Oxygen is a major ingredient in ruby, sapphire, chrysoberyl and spinel.

As a mineral form, certain atoms attract each other and arrange themselves in an orderly geometric pattern called the crystal structure. All mineral crystals have their atoms arranged in some combination of fourteen basic patterns.

Minerals usually occur as crystalline grains in rocks. Because the grains compete with neighbouring ones for very limited space, there usually isn’t room for complete crystal shapes to form. Time is another important factor in crystal growth. When molten rock cools quickly, natural glass or tiny crystals form. Slower cooling time gives larger crystals time to grow. Large crystals may form whenever conditions are right. They may grow slowly into open spaces in cracks or hollows in the rocks.

Occasionally, near perfect crystals are found. A mineral’s internal atomic structure determines its distinctive exterior crystal shape. Crystal shape often helps identify and distinguish gem minerals from one another.

Today, many gems can be created in laboratories. Synthetic gems have the same chemical composition and physical properties as naturally formed gemstones. A simulated gem may look like a natural gem, but there the similarity ends.
As with other gems, most precious gemstones are minerals. This mineral, however, is a chemical element or compound that forms in nature and possess a unique internal atomic structure, crystal. Minerals usually form because of inorganic processes that occur in rocks.

Furthermore, since mineral deposits can be found all over the world, so can the various gemstones.

In fact, many gems and stones come from South Africa and this is the reason why the industry remains sturdy.
Of some interest is the mining techniques used to procure such brilliant gems.

The following is a list of South Africa gems and minerals listed in our database:

• Chatoyant Quartz
• Enstatite
• Rhodonite
• Grossular Garnet
• Rhodochrosite
• Petalite
• Platinum
• Plasma Chalcedony
• Diamond
• Chrysoprase
• Microcline
• Uvarovite
• Gold
• Zoisite
• Chrysoprase
• Diopside
• Chrysoberyl
• Pyrope
• Phosphophyllite
• Labradorite
• Dravite
• Taaffeite
• Rutile
• Tugtupite
• Lapis Lazuli
• Turquoise
• Sillimanite
• Oligoclase
• Spodumene
• Gypsum
• Tektites
• Shell

 

If you are interested in buying gemstones in South Africa you need to look out for the following:

How to buy gemstones in South Africa
1. Look at the background of the seller!
2. Look at the credentials of the seller!
3. Study the gemstone.
4. Is the gemstone from South Africa or not?
5. Check the integrity of the seller.

 

To view more articles, please visit the Leads 2 Business Blog.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.

 

References:
Cape Town Diamond Museum
Rock Hounds
Touch Gemstones
Gemrock Auctions
Cape Town Magazine
Interflora
Gem5
Diamond Portfolio
SAMAA

 

 

 

About Christine Brooks

I started working for Leads 2 Business in June 2015 as an Account Executive until present. Looking after new and existing clients making sure we meet their requirements.

Industry Events: Cape Construction Expo 2018 and Electra Mining Africa 2018

Industry Events: Cape Construction Expo 2018 and Electra Mining Africa 2018

Construction Events

 

Event:

Cape Construction Expo 2018

Date:

12 – 13 September 2018

Event location:

Sun Exhibits, GrandWest, Cape Town

Event Description:

The Cape Construction Expo is the prime meeting place for construction industry professionals in the Western Cape. With eight dedicated product zones and numerous free workshops, the event caters to the Western Cape’s construction, cement and concrete industries. The audience includes architects, engineers, contractors, quantity surveyors, government representatives as well as suppliers of products and services to the industry. Leads 2 Business will also be exhibiting join our Facebook Event,  visit us at Stand 312 or contact us for your free ticket.

Contact Details:

Tel: +27 21 700 5515
E-mail: justinmarthinus@dmgevents.com

Event Details:

Website
Pre-registration
Booking

 

Event:

Electra Mining Africa 2018

Date:

10 – 14 September 2018

Event location:

Expo Centre Nasrec, Johannesburg

Event Description:

Showcase of the latest and greatest innovations and technologies, the leading products and services, and the most cutting-edge machinery, equipment and solutions. Not forgetting the advice from technical experts and the knowledge gained from our free-to-attend seminars. Don’t miss this opportunity to get great ideas to assist you in keeping future-fit for your business growth.

Contact Details:

Tel: +27 10 003 3060

Event Details:

Website
Pre-registration
Booking

 


If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
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About Sasha Anderson

I enjoy making new professional acquaintances and corresponding with existing clients. Reach out if you want to talk, L2B, social media, construction, technology, shoes, dachshunds, popular culture or travel.

The World’s Biggest Diamonds

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The world’s biggest diamonds.

 

Diamonds dates back billions of years, and tells a tale of beauty, wealth and spirit. The word ‘Diamond’ originated from the Greek word ‘adamas’, which means unconquerable or unbreakable.  For thousands of years diamonds have stood for far more than just a beautiful sparkly gem.

The Pharaohs believed that diamonds represented the sun (a symbol of power, courage and truth).  In Ancient India it symbolized clarity and invincibility. Ancient Greeks believed diamonds to be the tears of the gods. In the middle ages it was believed that the diamond was a miracle stone, having exceptional healing abilities. In Europe, 322BC, diamonds were reserved only for Kings as it stood for strength, courage and invincibility and by the 1600 – 1750 diamonds symbolised ultimate prosperity and wealth among woman and men.

The tale of the modern diamond market really begins with the discovery of diamonds in Kimberly round about 1866. South Africa plays one of the most important roles in the history of diamonds as 65% of all diamonds were mined in SA and some of the world’s most famous diamonds have been discovered in SA.

 

Here are 8 of the world’s biggest diamonds ever to be discovered:

Sergio (3,167 carats)

The Sergio is the largest carbonado (black) diamond ever found. It is also the largest rough diamond ever found. This very rare diamond was discovered in the state of Bahia in Brazil in 1895. Carbonado is the toughest form of natural diamond which is an impure form of polycrystalline diamond consisting of diamond, graphite, and amorphous carbon. Like many other carbonado diamonds, it’s believed to be of a meteoritic origin. The diamond was discovered by Sérgio Borges de Carvalho.  The diamond was broken up into smaller 3-6 carat pieces as industrial diamond drills.

 

Cullinan Diamond (3,106.75 carats)

The Cullinan Diamond was discovered by Sir Thomas Cullinan in 1905. This largest gem quality rough diamond which was ever found was discovered in the Premier No. 2 mine in Cullinan, South Africa.  The Cullinan was placed on sale in London in April 1905 and despite a large amount of interest stayed unsold after 2 years. The Transvaal Colony government bought the Cullinan in 1907 and presented the diamond to King Edward VII on his 66th Birthday.  The Cullinan was cut into various sizes such as Cullinan I (also known as the Great Star of Africa) and is the largest clear cut diamond in the world and is mounted in the head of the Sovereign’s Sceptre with Cross. Cullinan II is the second-largest (also known as the Second Star of Africa) and is mounted in the Imperial State Crown. Both these diamonds form part of the Crown Jewels of the United Kingdom. Queen Elizabeth II privately owns 7 other major diamonds which was cut from the Cullinan. These diamonds she inherited from her grandmother, Queen Mary in 1953.

Excelsior Diamond (955.20 carats)

This diamond was known as the largest gem-quality diamond in the world from the time it was discovered on 30 June 1893 until 1905 when the Cullinan Diamond was discovered.  The Excelsior diamond was discovered at Jagersfontein Mine, South Africa, in a shovelful of gravel that was being loaded into a truck by a worker.  The diamond was unsold for many years before the owners of the diamond made the decision to cut the stone in the several smaller stones, which meant that it would never be a single large spectacular stone. The diamond was of a blue-white tint colour.

 

Star of Sierra Leone (968.9 carats)

With the discovery of this Diamond in the Diminco alluvial mines in the Koidu area of Sierra Leone on 14 February 1972, it was ranked the fourth largest diamond found. This diamond was also ranked as the largest Alluvial diamond ever to be discovered, which is the term used to describe diamonds which has been removed from the primary source (the kimberlite pipe) by natural erosive action over an extended period of time and finally deposited into a new environment such as a river bed. The diamond was cut into an emerald shaped stone, but was re-cut at a later stage due to an internal flaw.  This resulted in 17 separate diamonds of which 13 were deemed to be flawless.

 

The Incomparable Diamond (890 carats)

Discovery of this Diamond was near MIBA Diamond Mine, Democratic Republic of the Congo and was found in a pile of rubble from mine dumps by a young girl in 1984. The rubble was considered to be too bulky to contain any diamonds and therefor had been discarded.  The young girl gave the diamond to her uncle, who then sold it to a diamond dealer. Once the diamond was transported to Belgian, it took years of master craftsmen to cut this diamond into a gorgeous yellow-brown diamond.

Millennium Star (777 carats)

This near to perfect diamond was discovered in the Mbuji-Mayi district of Zaire in 1990 and is currently owned by De Beers Company. This pear-shaped stone is stunningly flawless internally and externally and is known to be the second largest top-colour rating diamond in the world. This diamond is one of the most beautiful diamonds in the world, and experts have declared it to be priceless.

 

The Woyie River Diamond (770 carats)

This beautiful diamond was discovered in Koidu, Sierra Leone in 1945 and at the time was the largest alluvial diamond ever to be found. The rough diamond was brought to London in 1947 where it was viewed by Queen Mary and later exhibited in 1949 at the British Industries Fair.

 

The Golden Jubilee (755 Carats)

This gorgeous yellow-brown coloured gem was discovered in South Africa in 1985 and was first known as the “Unnamed Brown” due to its colour. The diamond remained unknown to the outside world until 1990 and required 2 years work to bring this beauty to its current state. The diamond was purchased by a group of Thai business people led by Henry Ho in 1995. It was arranged for the diamond to be given as a gift from the people to King Bhumibol to celebrate the 50th anniversary of the King’s accent to the throne. It was received on his behalf in 2000 by his daughter, Princess Matia Chari Sirindhom and is now on display in the Royal Museum at Pimammek Golden Temple Throne Hall in Bangkok as part of the crown jewels.

As one of the world’s most precious substances, diamonds have been greatly desired across the globe for countless ages. They are changeless and astonishingly durable. The powerful symbolism they embody only adds to their tremendous worth.
Diamonds don’t get old, they only become more valuable.

That’s why they perfectly represent love, power, and the majesty & mystery of the universe.

 

Sources:
Wikipedia
Flickr
Pixabay

To view more articles, please visit the Leads 2 Business Blog.
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About Nadine Vermeulen

I started working at Leads 2 Business in October 2014 in the Leads 2 Quotes Department. I managed all the Daily Tender Bill Requests and followed up on BoQ's for our Daily Tender Subscribers. In 2017, I was promoted to L2Q Assistant and now work with Bill of Quantities for Contractors. 🙂

Featured Project: Karoshoek Solar Valley Development

Karoshoek Solar Valley Development

Karoshoek Solar Valley Development

Description
Construction of a commercial Solar Thermal Plant, located approximately 30km east of Upington, Northern Cape.

 

Status Region
Underway Northern Cape
Category Value
Infrastructure R 100 million+
Industry Timing
Power Grid October 2015 – October 2018
Sector Class
Private EPCM 

 

Karoshoek Solar Valley Development

Please visit Leads 2 Business for more information on the Karoshoek Solar Valley Development
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.
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About Debbie Wessels

Juggling a energetic, full of surprises life, working full time with two teenagers and hoping to still be sane and normal by the time I retire.

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