Gemmology
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Repository

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.

More specimens of gemstones

Topaz — specimen 0253Topaz — specimen 0253

Weight: 1.35 ct; size: 6.02 | 5.98 | 4.10 mm; shape: octagon; colour: medium dark very strongly greenish blue; very slightly greyish. Very clean specimen of ‘London blue’ colour variety; step style cut; good polish.
Marialite-meionite series — specimen 0255Marialite-meionite series — specimen 0255

Weight: 0.39 ct; size: 6.11 | 4.02 | 2.82 mm; shape: oval; colour: light yellow; very slightly brownish. Very clean specimen; good mixed style cut. Source: Gary Eisenberg, Knoxville, Tennessee.
Sapphire — specimen 0263Sapphire — specimen 0263

Weight: 0.18 ct; size: 3.45 | 3.43 | 2.11 mm; shape: round; colour: light yellow; very slightly brownish. Very clean, not treated specimen; good brilliant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Malaia garnet — specimen 0268Malaia garnet — specimen 0268

Weight: 0.19 ct; size: 3.54 | 3.51 | 2.15 mm; shape: round; colour: medium light yellowish green; slightly greyish. Very clean specimen; good brilliant 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