Boulangerite
Pb₅Sb₄S₁₁
Sulfides
Hardness 2,75
· Monoclinic
Photo: Robert M. Lavinsky · CC BY-SA 3.0
C
Is a very rare mineral belonging to the group of sulfosalts. Tartarosite is interesting because of its unusual chemical composition and rarity of occurrence
Source: Wikidata
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