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Diameter, mm (1mm - 0,039inch)

Collectible minerals - full range in stock "Oligoclase"

Oligoclase - Oligoclase is a rock-forming mineral from the plagioclase subgroup of the feldspar group. Consists of 10-30% anorthite and 90-70% albite. Included in many breeds. Characteristic of acidic igneous rocks and many metamorphic rocks.

You can see oligoclase stone for sale and buy it in the Minerals of Russia online store.

Physical Properties of Oligoclase

Category plagioclase, feldspar, tectosilicate
(repeating unit)
(Ca,Na)(Al,Si)4O8, where Ca/(Ca + Na) (% anorthite) is between 10%–30%
Crystal system Triclinic
Crystal class Pinacoidal (1)
(same H-M symbol)
Color usually white, with shades of grey, green, or red
Cleavage Perfect {001}, Good {010} , Poor {110}.
Fracture Uneven, Sub-Conchoidal
Mohs scale hardness 6 to 6.5
Luster Vitreous
Streak White
Specific gravity 2.64 to 2.66
Refractive index nα=1.533–1.543; nβ=1.537–1.548; nγ=1.542–1.552
Birefringence 1st order

Code: 4372
North Karelia, RF

0.00 $ $10.00

Code: 4373
North Karelia, RF

0.00 $ $3.33

Code: 4245
North Karelia, RF

0.00 $ $6.33

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