Pentlandite Value, Price, and Jewelry Information


Pentlandite
By John Sobolewski (JSS) (http://www.mindat.org/photo-192760.html) [CC-BY-3.0], via Wikimedia Commons

Pentlandite resembles other yellowish metallic minerals and is cut by collectors as a curiosity. The cut stones are quite attractive but too soft for hard wear.

Pentlandite Value

The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

Pentlandite Information

DataValue
NamePentlandite
Crystallography Isometric. Crystals extremely rare; massive, granular.
Colors Light bronze yellow.
Luster Metallic; opaque.
Fracture Conchoidal. Brittle.
Hardness 3.5-4.
Cleavage None.
Stone SizesCabochons of any desired size can be out from massive material.
Luminescence None. Nonmagnetic.
Formula(Fe,Ni)9S8

Occurrence: Associated with pyrrhotite and other nickel ores in basic rocks.

Norway; Transvaal, South Africa; Alaska; California; Nevada.

Sudbury, Ontario, Canada: major ore mineral, huge masses.

Comments: Pentlandite resembles other yellowish metallic minerals and is cut by collectors as a curiosity. The cut stones are quite attractive but too soft for hard wear.

Pentlandite is usually intimately intermixed with pyrrhotite and chalcopyrite in Canadian ore bodies, creating an interesting, multicolored metallic appearance.

Name: After J.B. Pentland who first noted the mineral.