Some exceptional specimens of gemstones from our ‘Repository’
Repository
The section ‘Repository’ contains data and photos of 760 specimens of gemstones. The smallest is just 1.96 mm (0.02 ct) ruby from Mozambique, and the largest — 70.11 mm (326.60 ct) rock crystal from Africa.
Additionally there are 8 specimens of synthetic stones.
— Weight: 0.61 ct; size: 5.60 | 4.07 | 3.11 mm; shape: oval; colour: medium very strongly greenish blue; slightly greyish. Very clean specimen; very good mixed style cut. The colour change is mainly caused by relatively high amounts of vanadium (Schmetzer & Bernhardt, 1999). Source: David Weinberg, Multicolour Gems Ltd.