The Steinmetz pink is a wonderful 59.60 carat oval faceted diamond. It is the world’s largest Fancy Pink diamond, and is Internally Flawless, and was unveiled in ceremony in Monaco in 2003, worn around supermodel Helena Christensen’s neck.
Most pink diamonds found today come from the Argyle Mine in Australia, but typically they are smaller than 1 carat. (Unusually enough, the 100 carat piece of rough that became the Steinmetz pink was found in Southern Africa). Large examples are extremely rare, and flawless ones are particularly unusual. Most pink diamonds are only faintly pink;intense and vivid shades of pink occur very rarely in nature. A natural vivid pink diamond can cost many hundreds of thousands, if not millions, of dollars. The world’s largest pink diamond is a 186 carat stone, called the Sea of Light, (Darya-I-Noor). It is set in the Iranian Crown Jewels.
The cause of colour in pink diamonds is thought to be something called plastic deformation, brought about by microscopic imperfections at the atomic level. (This is the same thing that causes the colour in red diamonds, discussed in another posting about fancy coloured diamonds). It is estimated that for every million carats of rough diamonds found, only 1 carat will be intense pink.
The Steinmetz Pink is named after its owners, the Steinmetz Group, a firm of diamond cutters.