Smaltite Value, Price, and Jewelry Information

By Didier Descouens (Own work) [GFDL or CC-BY-SA-3.0-2.5-2.0-1.0], via Wikimedia Commons

Smaltite

Smaltite is a collectors oddity, cut only as cabochons. It is seldom seen in collections since it is not especially distinctive, with a color resembling other metallic sulfides and arsenides.

Smaltite Information

Data Value
Name Smaltite
Is a Variety of Skutterudite
Colors Silver gray to tin white; may tarnish gray to iridescent.
Crystallography Isometric. Crystals cubic to octahedral; massive. fine-grained.
Luster Metallic.
Hardness 5.5-6
Fracture Uneven to conchoidal
Specific Gravity ~ 6.1.
Birefringence None.
Cleavage Distinct 2 directions
Stone Sizes Cabochons could be cut to any size from massive material.
Luminescence None.
Luminescence Present No
Transparency Opaque.
Phenomena Iridescence.
Formula

(Co,Ni)As3. Considered to be an arsenic-deficient Skutterudite.

Pleochroism

None.

Streak: Black.

Occurrence: Occurs in medium- to high-temperature veins, with Ni and Co minerals.

California; Colorado.

Cobalt district. Ontario and British Columbia, Canada.

Chile; Switzerland: Germany.

Comments: Smaltite is a collectors oddity, cut only as cabochons. It is seldom seen in collections since it is not especially distinctive, with a color resembling other metallic sulfides and arsenides.

Name: From its use as a source of cobalt for the pigment smalt, which is blue.

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