What is Diaboleite?
Diaboleite is a rare blue lead-copper chloride hydroxide found in the oxidised zones of lead deposits.
Mineralogy and structure
The reference formula is Pb2CuCl2(OH)4. Diaboleite is soft and lead-bearing; preserve crystals as display specimens and avoid dust or abrasive cleaning.
Colour and appearance
Typical colours include deep blue, blue, blue-green. Its tabular, prismatic, granular habit and vitreous lustre are useful descriptive features, but colour alone is not diagnostic.
Formation and localities
Diaboleite forms in or is associated with arid oxidation zones where lead, copper and chloride-rich fluids interact. Important documented localities include Tsumeb in Namibia, Cornwall, Greece, Chile and selected lead districts.
Collecting and care
Diaboleite 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.
Diaboleite in popular symbolism
Some modern crystal guides associate Diaboleite 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.
