Polarite

Polarite, is an opaque, yellow-white mineral with the chemical formula Pd,(Bi,Pb). Its crystals are orthorhombic pyramidal, but can only be seen through a microscope. It has a metallic luster and leaves a white streak. Polarite is rated 3.5 to 4 on the Mohs Scale.^[3][4]

Polarite
General
Category	Alloys with PGE
Formula	Pd,(Bi,Pb)
IMA symbol	Plr[1]
Strunz classification	02.AC.40
Crystal system	Orthorhombic
Crystal class	Pyramidal (mm2) (same H-M symbol)
Space group	Ccm21
Unit cell	a = 7.19 Å, b = 8.69 Å, c = 10.68 Å; Z = 16
Identification
Color	White with yellowish tint
Crystal habit	Disseminated grains (microscopic)
Mohs scale hardness	3.5 - 4
Luster	Metallic
Streak	White
Diaphaneity	Opaque
Specific gravity	12.51
References	[2][3][4][5]

It was first described in 1969 for an occurrence in Talnakh, Norilsk in the Polar Ural Mountains in Russia.^[3] It has also been recorded from the Bushveld igneous complex of South Africa and from Fox Gulch, Goodnews Bay, Alaska.^[4]