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Entry № 243

Imperial Topaz

Al₂SiO₄(F,OH)₂

Golden-orange topaz once reserved for royalty.

Chakra

Solar Plexus · Sacral

Element

Fire · Sun

Zodiac

Leo · Sagittarius

Imperial Topaz

I. The Metaphysical Reading

How the stone has been held.

Imperial topaz is worked with as a stone of sovereign will and radiant self-worth, held when someone is stepping into visible leadership or reclaiming authority over their own life.

Chakra
Solar Plexus · Sacral
Element
Fire · Sun
Zodiac
Leo · Sagittarius
Keynote
Golden-orange topaz once reserved for royalty.

II. The Scientific Reading

What the lattice actually does.

Imperial topaz is the trade name for topaz in the golden-orange to reddish-pink colour range, historically reserved for stones from the Ouro Preto district of Minas Gerais, Brazil. Colour arises from a combination of chromium substitution and defect colour centres in the aluminium fluorosilicate structure. Topaz crystallises in fluorine-rich late-stage pegmatites and hydrothermal veins, and its perfect basal cleavage — despite Mohs 8 hardness — makes cutting a specialist skill.

Formula
Al₂SiO₄(F,OH)₂
System
Orthorhombic
Hardness
8 (Mohs)
Provenance
Brazil (Ouro Preto, Minas Gerais); minor Pakistan, Russia

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
Al₂SiO₄(F,OH)₂
Crystal System
Orthorhombic
Mohs Hardness
8 (Mohs)
Density
3.49 – 3.57 g/cm³
Refractive Index
1.606 – 1.644
Provenance
Brazil (Ouro Preto, Minas Gerais); minor Pakistan, Russia
Color Origin
Golden yellow to reddish-orange from chromium and colour centres

Related Crystals

Stones that share this lattice

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Fossil palm trunk turned to stone with its rods intact.