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

Cordierite — specimen 0380Cordierite — specimen 0380

Weight: 0.19 ct; size: 5.03 | 3.03 | 2.08 mm; shape: oval; colour: medium light blue; very slightly greyish. Very clean specimen; good mixed style cut. Source: Gary Eisenberg, Knoxville, Tennessee.
Cordierite — specimen 0381Cordierite — specimen 0381

Weight: 0.19 ct; size: 5.04 | 3.03 | 2.12 mm; shape: oval; colour: medium light blue; very slightly greyish. Very clean specimen; good mixed style cut. Source: Gary Eisenberg, Knoxville, Tennessee.
Pleonaste — specimen 0384Pleonaste — specimen 0384

Weight: 0.13 ct; size: 2.95 | 2.94 | 1.98 mm; shape: round; colour: black. Small opaque specimen; good brilliant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Pleonaste — specimen 0385Pleonaste — specimen 0385

Weight: 0.14 ct; size: 2.97 | 2.96 | 2.08 mm; shape: round; colour: black. Small opaque specimen; good brilliant style cut. Source: David Weinberg, Multicolour Gems Ltd.
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