Shattukite

Shattuckite is Mineral belonging to the silicates and germanates class

shattukit shattukite
Shattukite with goethite

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Origin of name: named by American mineralogist Waldemar Theodore Schaller after its discovery locality, the Shattuck copper mine, Cochise County, Bisbee, Arizona

Synonyms and trade names: none

Can be confused with: other cupriferous (copper-bearing) minerals like azurite, chrysocolla, plancheite and chalcanthite as well as with vivianite, a phosphat mineral which turns black upon exposure to light

Localities: type locality is the Shattuk Mine in Bisbee. Other locations are in Argentina, Chile, Mexico, DR Congo, Namibia, South Africa, Japan, Greece, Italy, Slovakia and Germany. In Austria shattukite was found in the adit "Göttliche Vorsehung" (divine providence) of the old copper mine in the Großfragant, a side valley of the Möll Valley, Carinthia.

shattukit mesopotamia 504 Farm, Namibia
Shattukite from Namibia
Exact location: Mesopotamia 504 Farm, Mesopotamia copper valley, Khorixas, Kunene Region

Handling: shattukite is quite soft, cleaves perfectly in two directions and it is very sensitive to acids. Thus shattukite is not well suited for jewellery. Set with great care and keep away from acids and brines. Do not clean ultrasonically.

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Gemmological Properties of Shattukite

Formula:
Cu5(SiO3)4(OH)2
Crystal system:
orthorhombic
Mohs hardness:
3.5
Specific gravity:
4.11
Refractive index:
birefringent 1.753-1.815
Max. Birefringence:
0.062
Dispersion:
distinct to strong
Pleochroism:
visible
Luminiscence:
not known
Lustre:
silky
Cleavage:
perfect in two directions
Fracture:
uneven to splintery
Colour:
light to dark blue