现场拍卖 7454Important Jewellery
A RARE COLOURED DIAMOND SINGLE-STONE RING
拍品 209PROPERTY FROM AN INDIAN PRINCELY FAMILY

A RARE COLOURED DIAMOND SINGLE-STONE RING

成交价

GBP 333,600

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A RARE COLOURED DIAMOND SINGLE-STONE RING
The rectangular-cut fancy gray-yellowish green 'chameleon' diamond weighing 11.22 carats to the baguette-cut diamond shoulders and plain hoop
Accompanied by report No. 15310573 dated 9 November 2006 from the Gemological Institute of America stating that the diamond is fancy gray-yellowish green colour, VS1 clarity

专家说明

This 'chameleon' diamond just like the reptile of the same name has the ability to change colour. Under normal conditions the diamond has an olive-green colour which transforms to a yellow colour when heated to a temperature of 200-300° Centigrade or when left in the dark for several days. This interesting phenomena is caused by irregularities in the diamond's atomic structure