Bismuth (Synthetic Crystal)
Image: Alchemist-hp (talk) (www.pse-mendelejew.de) (FAL)
Mineral NameBismuth (Synthetic Crystal)
Chemical FormulaBi
Mohs Hardness2.25
Crystal Systemtrigonal
Streak ColorSilvery-gray
CleavagePerfect on {0001}
FractureUneven
Specific Gravity9.78
Colorsiridescent rainbow, silvery-white, pinkish
TransparencyOpaque
Type LocalitySynthetic (laboratory grown)
Mineral GroupNative Elements
Usescollector's item, alloys, pharmaceuticals, cosmetics
Description
A striking, complex hopper crystal of bismuth, characterized by its stepped, geometric growth and a vibrant iridescent surface displaying a rainbow of colors due to a thin oxidation layer.
Geological Context
This specimen is a synthetic crystal, grown under controlled laboratory conditions. Naturally occurring bismuth is found as a native element in hydrothermal veins and pegmatites, often associated with other metallic minerals.
