Orthoclase

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Orthoclase
Erongo Mountain, Erongo Region, Namibia

Item-No.: MIN5723
Price: 95.00 EUR 

Synonyms:  Argillyite, Common Feldspar, Cottaite, Leelite, Muldan, Murchinsonite, Paradoxite
Classification:  Silicates, Tektosilicates, Feldspar group
Chemical formula:  K(AlSi3O8)
Crystal system:  Monoclinic
Density (g/cm3):  2,55 - 2,63 measured, 2,563 calculated
Tenacity:  Brittle
Cleavage:  Perfect on {001}, good on {010}
Fracture:  Irregular/uneven, conchoidal
Hardness (Mohs):  6
Colour:  Colorless to white, greenish white, grayish yellow, pale pink
Lustre:  Vitreous, sub-vitreous, resinous
Streak:  White
Application:  Ceramics, abrasives, crushed stone, occasional as gemstone

 

 


 

 
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