DIAMOND BANGLE

The hinged bangle inset to the obverse with three brilliant-cut diamonds weighing 2.48, 2.29 and 2.37 carats respectively, the shoulders and clasp accented with baguette diamonds, dimension approximately 54 x 43mm.

During testing by The Gem Testing Laboratory of Great Britain, the 2.29 carat diamond was found to be a type IIa diamond with no identifiable inclusions, with a strong fluorescence under both long- and short-wave ultraviolet light, and therefore possessed all the characteristics of a synthetic diamond produced by the chemical vapour deposition (CVD) process. Subsequent testing with the 'DiamondView', which uses UV light to cause the diamond to fluoresce in a way that allows the growth structure to be observed, showed that the diamond had a patchy growth structure and was therefore natural, whereas a synthetic diamond would show a linear growth structure. It is not unheard of to have natural diamonds with orange fluorescence, although those previously seen have been type la.

Cf: Gems & Jewellery, December 2005, Orange Fluorescing diamond by Doug Garrod and Carole Gordon.

Cf.  The 'Flaming Star' Diamond, an 18.51 carat pear-shaped diamond sold for SF 950,000, in Sotheby's Geneva, Magnificent Jewels, 16th/17th November 1993, which displayed similar brilliant orange fluorescent characteristics.

Accompanied by three reports from The Gem Testing Laboratory of Great Britain, dated 14th October 2005, nos. 0015163, 0015162 and 0015164, stating for the: 2.29 carat diamond is F colour, VS2 clarity medium orange fluorescence; the 2.37 carat diamond is D colour, VS2 clarity, no fluorescence; and the 2.48 carat diamond is D colour, VS2 clarity, no fluorescence.