Gemmology
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Repository

Some exceptional specimens of gemstones from our ‘Repository’

Repository


The section ‘Repository’ contains data and photos of 728 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

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.
Chrysoberyl — specimen 0166Chrysoberyl — specimen 0166

Weight: 0.33 ct; size: 4.79 | 3.69 | 2.33 mm; shape: oval; colour: medium yellowish green; slightly greyish. Very clean specimen; excellent mixed style cut. Source: Jeffery Davies, Jeffery Davies Fine Jewelry & Gemstones.
Opal — specimen 0167Opal — specimen 0167

Weight: 1.15 ct; size: 9.02 | 5.40 | 3.79 mm; shape: octagon; colour: medium red; strong. Very clean specimen of ‘fire opal’ variety; step cut style.
Featured
Danburite

— In granite and metamorphosed carbonate rocks associated with hydrothermal activity (Anthony et al., 2001—2005).

Specimen figured

Danburite — specimen 0122weight: 0.41 ct; shape: round. Very clean specimen; very good Portuguese style cut. Source: David Weinberg, Multicolour Gems Ltd.
Danburite — specimen 0122