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

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.
Turquoise — specimen 0602Turquoise — specimen 0602

Weight: 0.68 ct; size: 7.03 | 5.02 | 2.70 mm; shape: oval; colour: medium green-blue or blue-green; very slightly greyish. Clean specimen; good cabochon style cut.
Malachite — specimen 0603Malachite — specimen 0603

Weight: 3.80 ct; size: 10.15 | 8.02 | 4.31 mm; shape: pear; colour: medium dark very slightly bluish green; very slightly greyish. Clean specimen; good cabochon style cut.
Featured
Epidote

— Characteristic of several facies of regionally metamorphosed rocks and some contaminated felsic igneous rocks; in contact zones between igneous and calcareous sedimentary rocks; from alteration of plagioclase (Anthony et al., 2001—2005). Faceted specimens are rare.

Specimen figured

Epidote — specimen 0054weight: 0.52 ct; shape: octagon. Very clean specimen; very good step cut style. Source: John Bradshaw, Coast to Coast Rare Stones International.
Epidote — specimen 0054