Gemmology
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Repository

Some exceptional specimens of gemstones from our ‘Repository’

Repository


The section ‘Repository’ contains data and photos of 732 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 7 specimens of synthetic stones.

More specimens of gemstones

Moonstone — specimen 0162Moonstone — specimen 0162

Weight: 0.85 ct; size: 7.04 | 5.03 | 3.18 mm; shape: oval; colour: medium reddish orange; slightly brownish. Clean specimen; cabochon style cut.
Moonstone — specimen 0163Moonstone — specimen 0163

Weight: 1.00 ct; size: 6.95 | 5.00 | 3.89 mm; shape: oval; colour: medium reddish orange; slightly brownish. Clean specimen; cabochon style cut.
Magnesite — specimen 0164Magnesite — specimen 0164

Weight: 4.86 ct; size: 11.55 | 9.62 | 6.01 mm; shape: octagon; colour: colourless. Very clean specimen; good step cut style. Source: John Bradshaw, Coast to Coast Rare Stones International.
Dolomite — specimen 0165Dolomite — specimen 0165

Weight: 3.73 ct; size: 11.54 | 9.39 | 5.97 mm; shape: oval; colour: very light grey. Very clean specimen; excellent mixed style cut by master cutter Miro, Idar-Oberstein. Source: Ales Patrick Krivanek, Saint Claire Finest Jewels.
Featured
Actinolite

— Produced by regional or contact metamorphism of magnesium carbonate, mafic, or ultramafic rocks (Anthony et al., 2001—2005). Faceted specimens are extremely rare.

Specimen figured

Actinolite — specimen 0075weight: 1.48 ct; shape: oval. Very clean specimen; mixed style cut; good polish. Source: John Bradshaw, Coast to Coast Rare Stones International.
Actinolite — specimen 0075