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

Bowenite — specimen 0152

— Weight: 5.12 ct; size: 14.07 | 10.03 | 4.85 mm; shape: oval; colour: medium yellow; very slightly brownish. Clean specimen; very good cabochon style cut.

Moonstone — 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 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 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.

Featured

Sanidine

— Most common in felsic volcanic rocks; in volcanic glass; also from mafic, high-temperature contact metamorphic, and hydrothermally altered rocks; from eclogite nodules in kimberlite (Anthony et al., 2001—2005).

Specimen figured

Sanidine — specimen 0017 — weight: 1.08 ct; shape: oval. Very clean specimen; very good mixed style cut. Source: John Bradshaw, Coast to Coast Rare Stones International.