Heterogenite in botryoids xls up to 2.5 mm black, iridescent with metallic luster richly set in the vugs of matrix.
Formula :
Co3+O(OH)
System: trigonal Hardness:4 Rarity:not common
Strunz id:IV/F.7-40 -
OXIDES and HYDROXIDES
Name origin: From the Greek for "of another kind", as the mineral differs in composition from similar minerals.
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 Specimen weight:40 gr.
 Crystal size:up to 2.5 mm wide
 Overall size: 42mm x 38 mm x 40 mm
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