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

Triplite — specimen 0587Triplite — specimen 0587

Weight: 0.11 ct; size: 3.07 | 2.98 | 1.82 mm; shape: cushion triangle; colour: medium light orangey red; strong. Very clean specimen; very good mixed style cut. Source: John Bradshaw, Coast to Coast Rare Stones International.
Diamond — specimen 0599Diamond — specimen 0599

Weight: 0.04 ct; size: 2.18 | 2.16 | 1.37 mm; shape: round; colour: colourless. Very clean specimen; very good brilliant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Jasper — specimen 0600Jasper — specimen 0600

Weight: 18.55 ct; size: 26.82 | 15.54 | 4.13 mm; shape: freeform; colour: dark red. Clean specimen; excellent cabochon style cut by Nathan Christensen, Lincoln, Nebraska.
Turquoise — specimen 0601Turquoise — specimen 0601

Weight: 0.66 ct; size: 7.01 | 5.01 | 2.59 mm; shape: oval; colour: medium green-blue or blue-green; very slightly greyish. Clean specimen; good cabochon style cut.
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