Entry № 129
Dioptase
Hydrated Copper Silicate
A copper silicate whose green rivals emerald itself.
Chakra
Heart
Element
Water · Earth
Zodiac
Scorpio

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
Next in the Atlas
Dolomite
A soft carbonate of pale-pink saddle crystals.




