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Topaz Imperial
Ouro Preto, Minas Gerais, Brazil
◆ Unique Specimen — one of a kind
125,00 €
Warm golden-orange Imperial Topaz from Ouro Preto, Minas Gerais — the world’s only source of this rarest topaz variety. Well-formed orthorhombi...
Unique piece
Description
The municipality of Virgem da Lapa in the Vale do Jequitinhonha is one of Brazil’s classic topaz localities, known for colourless to pale-blue orthorhombic crystals of gemstone quality. The pegmatites of this region yield well-formed topaz prisms with the characteristic diamond-like vitreous lustre and perfect basal cleavage of the species.
Topaz from Virgem da Lapa is typically water-clear, making it prized both as a collector mineral and as gem rough. The Jequitinhonha Valley has been mined for coloured stones since the colonial era and remains one of South America’s most productive gem regions.
- Mineral
- Topaz
- Locality
- Ouro Preto, Minas Gerais, Brazil
- Size
- 2,5cm x 1,5 cm
- Weight
- 7,5 g (without a stand)
- Formula
- Al₂SiO₄(F,OH)₂
- Crystal System
- Orthorhombic
- Hardness
- 8
- Specific Gravity
- 3.49–3.57
- Luster
- Vitreous
- Condition
- Natural
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