Vaesite

Vaesite (NiS₂) is a mineral found together with cattierite in the Democratic Republic of Congo. It is named after Johannes F. Vaes, a Belgian mineralogist.^[3] It is part of the pyrite group.^[2]

Vaesite
Vaesite on a matrix
General
Category	Sulfide minerals
Formula	NiS2
IMA symbol	Va[1]
Crystal system	Isometric
Identification
Color	Black, silver-gray
Cleavage	Distinct/good {001}
Mohs scale hardness	4.5–5.5
Luster	Metallic
Streak	Black
Diaphaneity	Opaque
Specific gravity	4.45
References	[2]