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Rough Diamond
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Petra Blue

Petra Diamonds Limited announced the recovery of a 25.5 carat blue diamond at the Cullinan mine in South Africa. The stone is considered to be a high quality gem diamond of top colour. Blue diamonds are among the rarest and most highly coveted of all diamonds and the Cullinan mine is the most important source […]

Gem among gems…

  It remains the largest diamond cut in Canada- this “gem among gems” as claimed by the Vancouver Sun at the time, was cut by my father, Mike Botha in 1998- the year Master Diamond Cutters was first established in Canada. Those of you who have had the privilege of hearing the story about the […]

Flawless, absolutely flawless

On 15 May 2013 Christie’s will have the privilege of presenting at auction in Geneva an extraordinary pear-shaped perfect diamond weighing 101.73 carats. Offered for sale for the very first time, this sensational gemstone is not only one of the largest pear-shaped diamonds known to date, it is also one of the world’s most perfect […]

The Steinmetz Sirius

The Steinmetz Sirius (not to be confused with Sirius Star®…the world’s brightest diamond®) is a 103.83 carat D IF cushion shaped diamond mined from the legendary Premier mine in South Africa. This legendary cushion shaped stone is claimed to be one of the largest D colored, internally flawless diamonds to ever appear at auction and is only […]

‘Allo ‘allo Alrosa….

Russian mining behemoth Alrosa has recovered a 145.44 carat diamond from the Yubileynaya Diamond Pipe. The octahedron-shaped diamond is transparent with a yellow hue. According to Alrosa’s diamond sorting center, the stone could be valued at up to $1 million at auction. The diamond’s dimensions are 35mm x 20mm x 26 mm. There are small […]

The Blue Empress

The Blue Empress is a spectacular 14 carat perfectly symmetrical pear-shaped, fancy vivid blue diamond.The most distinguishing feature of the diamond is its perfect symmetrical shape. it was mined at the Premier Diamond Mine in South Africa and was purchased from De Beers by the Steinmetz Group of Geneva, a leading diamond specialist. The clarity […]

The Beluga

The Beluga is a 102 carat oval that was cut by the William Goldberg firm from a rather flat, blocky 265.82 carat piece of rough, and is claimed to be the largest F flawless standard oval brilliant cut diamond in the world. The odd-shaped stone arrived as a 265.82 carat rough with secrets waiting to be […]

Sefadu

The Sefadu  is an uncut diamond weighing 620 carat which easily makes it one of the worlds’ largest diamonds. It’s owned by leading diamond manufacturer Lazare Kaplan- its current whereabouts is unknown. It is one of the largest rough stone ever found, and the only one of the top stones never to have been cut.   The Tolkowsky Connection…amongst others In 1919, […]

Vargas

The Vargas Diamond, discovered in Brazil on August 13, 1938 by Joaquim Venancio Tiago and Manoel Miguel Domingues, was 726.6 carat when pulled out of the ground. Twenty nine smaller diamonds were carved from the larger rough Vargas Diamond including the 48.26 carat emerald cut diamond named “President Vargas”, after the former Brazilian President, Getúlio […]

Is it a bird?

The Raven is a 12.78 carat black trilliant shape purchased in 2011. It is currently in a private collection in upstate NY. Carbonado, commonly known as the “Black Diamond”, is a natural polycrystalline diamond found in alluvial deposits in the Central African Republic and Brazil. Its natural colour ranges from black to dark grey, and […]

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