Lyonsite
A variety of Minerals
What is Lyonsite?
Lyonsite (Cu3Fe4(VO4)6) is a rare black vanadate mineral that is opaque with a metallic lustre. It crystallizes in the orthorhombic crystal system. Lyonsite often occurs as small tabular typically well formed crystals. Lyonsite has a good cleavage and a dark gray streak. Lyonsite occurs as a sublimate in volcanic fumaroles. It is often associated with howardevansite and thenardite. It was first described in 1987 for an occurrence on the Izalco volcano, El Salvador. It was named for mineralogist John Bartholomew Lyons (1916–1998) of Dartmouth College. It has also been reported from a mine dump in the Lichtenberg Absetzer Mine of Thuringia, Germany.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Lyonsite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Lyonsite Localities Map
See where Lyonsite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black. Creamy-white in reflected light.
Chemical Properties
- Chemical Formula
- Cu3Fe4(VO4)6
- Elements
- Cu, Fe, O, V
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Lyonsite FAQs
How do I identify Lyonsite?
Lyonsite can be identified by its Black. Creamy-white in reflected light. color. Look for these key characteristics when examining specimens.
What color is Lyonsite?
Lyonsite typically appears in Black. Creamy-white in reflected light.. Color can vary depending on impurities and formation conditions.
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