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

Hyacinth — specimen 0488Hyacinth — specimen 0488

Weight: 0.43 ct; size: 4.57 | 4.56 | 2.75 mm; shape: round; colour: medium light yellow; very slightly brownish. Very clean specimen; very good brilliant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Hambergite — specimen 0489Hambergite — specimen 0489

Weight: 0.26 ct; size: 5.15 | 3.86 | 2.54 mm; shape: oval; colour: colourless. Very clean specimen; very good mixed cut style. Source: David Weinberg, Multicolour Gems Ltd.
Phenakite — specimen 0490Phenakite — specimen 0490

Weight: 0.41 ct; size: 5.54 | 4.37 | 2.80 mm; shape: oval; colour: colourless. Very clean specimen; very good Portuguese style cut. Source: David Weinberg, Multicolour Gems Ltd.
Phenakite — specimen 0491Phenakite — specimen 0491

Weight: 0.41 ct; size: 5.56 | 4.41 | 2.51 mm; shape: oval; colour: colourless. Very clean specimen; very good Portuguese style cut. Source: David Weinberg, Multicolour Gems Ltd.
Featured
Bastnäsite-(Ce)

— The most abundant rare earth elements-bearing mineral, typically hydrothermal, although primary igneous occurrences are known; in granite and alkali syenites and pegmatites; in carbonatites (Anthony et al., 2001—2005). Faceted specimens are very rare.

Specimen figured

Bastnäsite-(Ce) — specimen 0280weight: 0.75 ct; shape: oval. Very clean specimen; very good mixed style cut.
Bastnäsite-(Ce) — specimen 0280