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Some exceptional specimens of gemstones from our ‘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

Agate — specimen 0611Agate — specimen 0611

Weight: 23.20 ct; size: 29.96 | 21.45 | 4.63 mm; shape: oval; colour: medium dark orange; strong. Clean specimen; cabochon style cut..
Rock crystal — specimen 0616Rock crystal — specimen 0616

Weight: 5.70 ct; size: 20.61 | 6.52 | 5.88 mm; shape: octagon; colour: colourless. Very clean specimen; very good mixed style cut. Faceted by Multicolour Gems Ltd.
Rainbow obsidian — specimen 0617Rainbow obsidian — specimen 0617

Weight: 32.97 ct; size: 30.87 | 27.05 | 4.52 mm; shape: oval; colour: black. Clean specimen; excellent cabochon style cut by Nathan Christensen, Lincoln, Nebraska.
Agate — specimen 0619Agate — specimen 0619

Weight: 3.92 ct; size: 13.85 | 10.07 | 3.33 mm; shape: oval; colour: medium dark red; very slightly brownish. Clean specimen; very good cabochon style cut.

— Primarily in cavities in basalts; in gneisses and amphibolites, and in dikes derived from syenitic magmas (Anthony et al., 2001—2005). Extreme rarity as faceted specimens.

Specimen figured

Scolecite — specimen 0068weight: 0.54 ct; shape: octagon. Very clean specimen; step cut style; good polish. Source: John Bradshaw, Coast to Coast Rare Stones International.
Scolecite — specimen 0068