Botswana Diamonds digs up first stones at South African mine

botswanadiamonds-southafrica

Botswana Diamonds said Tuesday that it recovered the first diamonds from plant commissioning activities on its Marsfontein mine in Limpopo, South Africa.

The announcement comes only days after it received a mining permit for diamond-bearing gravels and residual unprocessed stockpiles around the operation.

Chairman John Teeling said the plant was very close to reaching full operations following the installation of an in-field screen, two rotary pans, grease and x-ray recovery system.

“I am delighted with the rapid progress the team has made on-site and it is noteworthy that the first diamonds were recovered within two weeks of the mining permit being granted,” Teeling said.

The Marsfontein mine was operated for two years in the late 1990s, with a payback of its entire development costs in less than four days. The mine’s grade was 172 carats per hundred tonnes, at a bottom cut-off of more than 1.2 mm, containing many fancy coloured diamonds.

The surrounding deposits in question were overlooked when the mine was closed.

Diamond miners are struggling across the board, especially those producing cheaper and smaller stones where there is an over-supply in the market.

Buyers, those that polish and cut diamonds for retailers, have been hit this year by lower prices and tighter credit, prompting them to delay purchases.

De Beers, the world’s top diamond producer by value, has responded by axing production — with a target of 31 million carats this year compared with 35.3 million in 2018.

It has also announced it would spend more on marketing. At the latest sale, the company increased the amount of stones buyers were allowed to reject in each lot purchased from 10% to 20%, according to people familiar with the auction.

Source: mining.com

Fancy Colour

Fancy Coloured Diamonds

Fancy Coloured Diamonds: Rarity, Value & Beauty
Fancy coloured diamonds are natural diamonds that exhibit intense colours beyond the typical white or colourless range. Unlike traditional diamonds graded on a D-to-Z colour scale (where lower grades indicate yellow or brown tints), fancy colour diamonds are valued for their saturation and rarity.

How Do Fancy Coloured Diamonds Get Their Colour?
Chemical Elements & Impurities

Nitrogen → Yellow & Orange Diamonds
Boron → Blue Diamonds
Hydrogen → Violet Diamonds
Crystal Lattice Distortions

Pink & Red Diamonds – Result from pressure-related distortions in the diamond’s atomic structure.
Green Diamonds – Exposed to natural radiation over millions of years.
Graphite & Other Inclusions

Black Diamonds (Carbonado) – Have numerous graphite or sulphide inclusions, giving them an opaque black appearance.
Types of Fancy Coloured Diamonds
Colour Cause of Colour Rarity Famous Examples
Pink Lattice distortion Extremely rare The Pink Star, Argyle Pink Diamonds
Red Lattice distortion Rarest of all The Moussaieff Red Diamond
Blue Boron impurity Very rare The Hope Diamond, The Blue Moon Diamond
Green Natural radiation exposure Rare The Dresden Green Diamond
Yellow Nitrogen impurity Common The Tiffany Yellow Diamond
Orange High nitrogen levels Very rare The Pumpkin Diamond
Purple Hydrogen impurity Rare The Supreme Purple Star
Brown (Champagne & Cognac) Structural defects Common Argyle Champagne Diamonds
Black Graphite inclusions Common The Black Orlov Diamond
White (Fancy White) Cloudy internal inclusions Rare The White Swan Diamond
How Fancy Colour Diamonds Are Graded?
Unlike colourless diamonds, fancy coloured diamonds are graded based on three main factors:

Hue – The primary colour (e.g., blue, pink, yellow).
Tone – Lightness or darkness of the colour.
Saturation – Intensity and strength of the colour (higher saturation means higher value).
GIA Fancy Colour Scale
Faint
Very Light
Light
Fancy Light
Fancy
Fancy Intense
Fancy Vivid (Highest value)
For example, a Fancy Vivid Pink Diamond is far more valuable than a Fancy Light Pink Diamond due to its stronger colour saturation.

Why Are Fancy Colour Diamonds So Valuable?
Extreme Rarity – Only 1 in 10,000 diamonds is a fancy colour diamond.
High Investment Value – Certain colours (Pink, Red, Blue, Green) appreciate over time.
Unique Beauty – Each coloured diamond is one of a kind.
Celebrity & Historical Demand – Famous diamonds increase awareness and desirability.