Gemmology
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Repository

Some exceptional specimens of gemstones from our ‘Repository’

Repository


The section ‘Repository’ contains data and photos of 670 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

Variscite — specimen 0076Variscite — specimen 0076

Weight: 4.75 ct; size: 16.75 | 10.08 | 3.61 mm; shape: oval; colour: medium light green; slightly greyish. Clean specimen; cabochon style cut.
Variscite — specimen 0077Variscite — specimen 0077

Weight: 4.67 ct; size: 20.15 | 8.25 | 3.73 mm; shape: oval; colour: medium light green; slightly greyish. Clean specimen; cabochon style cut.
Rose quartz — specimen 0079Rose quartz — specimen 0079

Weight: 4.31 ct; size: 14.84 | 8.42 | 5.61 mm; shape: oval; colour: very light purple. Very clean specimen; mixed style cut.
Petschite — specimen 0081Petschite — specimen 0081

Weight: 0.20 ct; size: 5.06 | 2.97 | 2.08 mm; shape: oval; colour: light blue; very slightly greyish. Very clean specimen; good mixed style cut. Source: Gary Eisenberg, Knoxville, Tennessee.
Featured
Sinhalite

— A rare accessory mineral formed in boron-rich skarns at the contact of limestones with granite or gneiss (Anthony et al., 2001—2005). Faceted specimens are relatively rare. The largest faceted stone is a 158 carat from Sri Lanka (Arem, 1987: 173).

Specimen figured

Sinhalite — specimen 0150weight: 1.43 ct; shape: cushion. Very clean specimen; very good mixed style cut.
Sinhalite — specimen 0150