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

Peridot — specimen 0307Peridot — specimen 0307

Weight: 0.35 ct; size: 4.41 | 4.40 | 2.70 mm; shape: round; colour: medium yellowish green; very slightly greyish. Very clean specimen; very good mixed style cut. Source: David Weinberg, Multicolour Gems Ltd.
Peridot — specimen 0310Peridot — specimen 0310

Weight: 0.37 ct; size: 4.42 | 4.41 | 2.78 mm; shape: round; colour: medium yellowish green; very slightly greyish. Very clean specimen; very good mixed style cut. Source: David Weinberg, Multicolour Gems Ltd.
Peridot — specimen 0311Peridot — specimen 0311

Weight: 0.35 ct; size: 4.42 | 4.38 | 2.70 mm; shape: round; colour: medium yellowish green; very slightly greyish. Very clean specimen; very good mixed style cut. Source: David Weinberg, Multicolour Gems Ltd.
Peridot — specimen 0312Peridot — specimen 0312

Weight: 0.34 ct; size: 4.45 | 4.42 | 2.69 mm; shape: round; colour: medium yellowish green; very slightly greyish. Very clean specimen; very good mixed style cut. Source: David Weinberg, Multicolour Gems Ltd.
Featured
Cordierite

— In thermally metamorphosed argillaceous sediments and regionally metamorphosed schists, gneisses; in mafic igneous rocks and granites (Anthony et al., 2001—2005). The gemstone bears the name iolite.

Specimen figured

Cordierite — specimen 0214weight: 0.18 ct; shape: oval. Very clean specimen; good mixed style cut. Source: Gary Eisenberg, Knoxville, Tennessee.
Cordierite — specimen 0214