Gemmology
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Repository

Some exceptional specimens of gemstones from our ‘Repository’

Repository


The section ‘Repository’ contains data and photos of 756 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.

More specimens of gemstones

Phenakite — specimen 0491Phenakite — specimen 0491

Weight: 0.41 ct; size: 5.56 | 4.41 | 2.51 mm; shape: oval; colour: colourless. Very clean specimen; very good Portuguese style cut. Source: David Weinberg, Multicolour Gems Ltd.
Phenakite — specimen 0493Phenakite — specimen 0493

Weight: 0.78 ct; size: 6.37 | 4.58 | 3.56 mm; shape: rectangle; colour: colourless. Very clean specimen; very good radiant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Danburite — specimen 0501Danburite — specimen 0501

Weight: 1.05 ct; size: 7.65 | 5.10 | 3.65 mm; shape: octagon; colour: colourless. Very clean specimen; very good radiant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Danburite — specimen 0502Danburite — specimen 0502

Weight: 0.74 ct; size: 6.69 | 4.64 | 3.45 mm; shape: octagon; colour: colourless. Very clean specimen; very good radiant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Featured
Cerussite

— Common in the oxidised zone of lead deposits, where it may constitute an important ore (Anthony et al., 2001—2005). Faceted specimens are very rare. The largest faceted stone is a 408 carat from Tsumeb, Namibia (Arem, 1987: 64).

Specimen figured

Cerussite — specimen 0029weight: 3.71 ct; shape: octagon. Very clean specimen; very good step cut style. Source: John Bradshaw, Coast to Coast Rare Stones International.
Cerussite — specimen 0029