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

Malaia garnet — specimen 0247Malaia garnet — specimen 0247

Weight: 0.12 ct; size: 3.12 | 3.10 | 1.93 mm; shape: round; colour: light reddish orange; very slightly brownish. Very clean specimen; good brilliant style cut. Source: David Weinberg, Multicolour Gems Ltd.
Benitoite — specimen 0248Benitoite — specimen 0248

Weight: 0.08 ct; size: 2.56 | 2.56 | 1.69 mm; shape: round; colour: light reddish orange; strong. Very clean specimen; very good mixed style cut. Extremely rare form produced by heating of a colourless stone.
Topaz — specimen 0253Topaz — specimen 0253

Weight: 1.35 ct; size: 6.02 | 5.98 | 4.10 mm; shape: octagon; colour: medium dark very strongly greenish blue; very slightly greyish. Very clean specimen of ‘London blue’ colour variety; step style cut; good polish.
Marialite-meionite series — specimen 0255Marialite-meionite series — specimen 0255

Weight: 0.39 ct; size: 6.11 | 4.02 | 2.82 mm; shape: oval; colour: light yellow; very slightly brownish. Very clean specimen; good mixed style cut. Source: Gary Eisenberg, Knoxville, Tennessee.
Featured
Gadolinite-(Y)

— In granite and alkalic granite pegmatites (Anthony et al., 2001—2005). Faceted specimens are extremely rare.

Specimen figured

Gadolinite-(Y) — specimen 0087weight: 2.21 ct; shape: octagon. Clean, opaque specimen; very good step cut style. Source: John Bradshaw, Coast to Coast Rare Stones International.
Gadolinite-(Y) — specimen 0087