Tuesday, 16 November 2010


If I had to have chosen a piece at today's Sotheby's auction at Geneva for its rarity, it would have actually not been the pink diamond, it would have been this one: a much more simple looking old cut 6 carat stone. But it happens to be also a Type lla diamond that is likely to come form the Golconda region in India. It is like having a piece of an legend and can even imagine it bestowing some kind of magical powers...

I quote below the description of the Sotheby's catalogue in awe to them having found such an extremely unique piece:

The Old Mine brilliant-cut diamond weighing 6.13 carats, simply mounted in platinum, size 51½.

600,000—900,000 CHF
Lot Sold.  Hammer Price with Buyer's Premium:  962,500 CHF

Accompanied by GIA report no. 6127143123 and by Gübelin report no. 1007083, stating that the diamond is D Colour, Internally Flawless. Together with GIA diamond type classification report and Gübelin note stating that the stone is a Type IIa diamond. Further accompanied by Gübelin appendix stating that: Diamonds of this type, exhibiting an antique cutting style as well as superior quality, are very rare and will most certainly evoke references to the historic term of 'Golconda'.

'Golconda' is a name steeped in the annals of diamond lore. The name of a now ruined fortress which originally served as a commercial trading centre, some days distant from the historic Indian mines of Ramalakota, Kollur and Soumelpour. The term 'Golconda' has now survived to describe the historic diamonds peculiar to India of great limpidity and purity. These diamonds are from the famed 'First water' mines, which produced the world's most spectacular diamonds, such as The Koh-I-Noor, The Hope and The Agra. This beautiful stone, with its appealing antique cut, is a member of the rare Type IIa group of diamonds known for their extreme purity, qualities compared so often throughout history to pure crystallized water. Scientifically this purity is due to the absence of nitrogen, producing stones often said to be beyond white.
In our opinion, this present gemstone may well be part of the highly desirable group of surviving diamonds which were mined in the Golconda region up to the beginning of the XVIIIth century.