Name:

millerite

A photo of the mineral millerite

Class:

Sulfides

Chemistry:

NiS Nickel Sulfide

Color(s):

gray, yellowish, brassy, metallic

Hardness:

3 - 3.5

SpecGrav:

5.3 - 5.5

Fracture:

splintery

Cleavage:

perfect

Crystal:

hexagonal (usually slender, hair-like, acicular crystals, often radiating groups)

Envronment:

hydrothermal replacement deposits, volcanic exhalation product.

Association:

calcite, chalcopyrite, sphalerite, galena, linneite, gerdorffite

Locals:

| Michigan, New York, Pennsylvania, USA | Canada | Germany |

Misc:

Named for the English minerologist, W. H. Miller. Soluble in HNO3 and aqua-regia.

Photos
& Locals:

1.) Wallace Stone Pit, Bayport, Mich.
2.) Wallace Stone Pit, Bayport, Mich.
3.) Wallace Stone Pit, Bayport, Mich.

4.) Wallace Stone Pit, Bayport, Mich. as a growth on chalcopyrite
5.) Wallace Stone Pit, Bayport, Mich. as a growth on chalcopyrite
6.) Wallace Stone Pit, Bayport, Mich. as a growth on chalcopyrite

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