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Entry № 129

Dioptase

Hydrated Copper Silicate

A copper silicate whose green rivals emerald itself.

Chakra

Heart

Element

Water · Earth

Zodiac

Scorpio

Dioptase

I. The Metaphysical Reading

How the stone has been held.

Dioptase is worked with as a stone of green-hearted healing, kept nearby during grief that refuses easy language, forgiveness that takes years and the reweaving of relationships across long silences. Practitioners hold it as a reminder that some greens are earned, not planted.

Chakra
Heart
Element
Water · Earth
Zodiac
Scorpio
Keynote
A copper silicate whose green rivals emerald itself.

II. The Scientific Reading

What the lattice actually does.

Dioptase is a hydrated copper silicate that forms in the oxidised zones of copper deposits, where copper-rich fluids react with silica-bearing groundwater. Its saturated green colour comes from copper in the silicate framework. Classic prismatic crystals come from Tsumeb, Namibia and the Altyn-Tyube deposit in Kazakhstan; the mineral is too soft and cleavable for most jewellery use.

Formula
CuSiO₃·H₂O
System
Trigonal
Hardness
5 (Mohs)
Provenance
Namibia (Tsumeb, Kaokoveld), DR Congo, Kazakhstan, Chile, USA (Arizona)

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
CuSiO₃·H₂O
Crystal System
Trigonal
Mohs Hardness
5 (Mohs)
Density
3.28 – 3.35 g/cm³
Refractive Index
1.644 – 1.720
Provenance
Namibia (Tsumeb, Kaokoveld), DR Congo, Kazakhstan, Chile, USA (Arizona)
Color Origin
Deep emerald to bluish-green transparent to translucent crystals

Related Crystals

Stones that share this lattice

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Dolomite

A soft carbonate of pale-pink saddle crystals.