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Entry № 029

Arsenopyrite

Iron Arsenic Sulphide

Bright metal with a warning in it.

Chakra

Root

Element

Earth · Fire

Zodiac

Aries · Scorpio

Arsenopyrite

I. The Metaphysical Reading

How the stone has been held.

Arsenopyrite is traditionally treated as a stone of protective vigilance and clear naming. Practitioners keep it at the edge of a workspace rather than close to the body, associating its bright faces with the recognition of unhelpful presence and its inner arsenic with the caution the recognition then requires.

Chakra
Root
Element
Earth · Fire
Zodiac
Aries · Scorpio
Keynote
Bright metal with a warning in it.

II. The Scientific Reading

What the lattice actually does.

Arsenopyrite is the most abundant arsenic-bearing mineral in the crust and the primary ore of arsenic. It crystallises in prismatic monoclinic forms that often show near-orthorhombic pseudosymmetry, and gives off a distinctive garlic odour when struck due to arsenic volatilisation. Historically a gangue mineral in gold and tin deposits, its presence often signals nearby precious-metal mineralisation.

Formula
FeAsS
System
Monoclinic (pseudo-orthorhombic)
Hardness
5.5 – 6 (Mohs)
Provenance
Germany, UK (Cornwall), Portugal, Bolivia, Mexico, Canada

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
FeAsS
Crystal System
Monoclinic (pseudo-orthorhombic)
Mohs Hardness
5.5 – 6 (Mohs)
Density
6.07 g/cm³
Refractive Index
Opaque (metallic)
Provenance
Germany, UK (Cornwall), Portugal, Bolivia, Mexico, Canada
Color Origin
Silver-white to steel-grey with metallic lustre, tarnishing to bronze

Related Crystals

Stones that share this lattice

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Next in the Atlas

Asphaltite

The slow stone that was once life.