What is Dolerophanite?
Dolerophanite is a rare copper sulfate oxide found in fumarolic and oxidised copper environments, usually as dark fine-grained material.
Mineralogy and structure
The reference formula is Cu2(SO4)O. Dolerophanite is a rare hydrated/oxidised copper mineral with limited specimen availability. The guide should prioritise locality and association over commercial claims.
Colour and appearance
Typical colours include dark green, black, brown. Its prismatic, granular, massive habit and vitreous, adamantine lustre are useful descriptive features, but colour alone is not diagnostic.
Formation and localities
Dolerophanite forms in or is associated with fumaroles and high-temperature oxidation zones of copper-bearing volcanic systems. Important documented localities include Mount Vesuvius in Italy, Chile and other volcanic copper localities.
Collecting and care
Dolerophanite is best kept as a labelled reference or collector specimen. Protect fragile crystals from impact and avoid cutting or grinding unknown material. Lead-, arsenic-, vanadium- and copper-bearing specimens are for display and careful handling only.
Dolerophanite in popular symbolism
Some modern crystal guides associate Dolerophanite with zodiac signs or symbolic themes based on colour, locality or collecting tradition. These associations vary between sources and are cultural interpretations, not mineralogical or medical properties.
