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Formula: Rh3S4
Simple sulphide of rhodium
Crystal System: Monoclinic
Specific gravity: 7.52 calculated
Hardness: 6
Streak: Black
Colour: Black
Environments
Localities
At the type locality, the Bir Bir River, Yubdo District, Gimbi, West Welega Zone, Oromia Region, Ethiopia,
kingstonite occurs in placers derived from
platinum-bearing dunite
and pyroxenite, as inclusions in a Pt-Fe alloy. It is found as
subhedral, tabular elongate to anhedral inclusions in a Pt-Fe nugget with the associated minerals
isoferroplatinum,
tetraferroplatinum, a Cu-bearing Pt-Fe alloy,
osmium, enriched oxide remnants of osmium,
laurite, bowieite and
cuprorhodsite. It is opaque with a metallic lustre, has a black streak, is
brittle and has a subconchoidal fracture and one good cleavage. It does not possess internal reflections
(MM 69.4.447-453, HOM).
Kingstonite from the Bir Bir River -
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