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Erongo Mountain, Erongo Region, Namibia

Item-No.: MIN5723
Price: 95.00 EUR 
Orthoclase, Albite
Dolní Bory, Bory, Žďár nad Sázavou District, Vysočina Region, Czech Republic

Item-No.: MINS84
Price: 26.00 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



TOPGEO Mineralienhandel GmbH
Dr. Petr Zajicek
Commercial register:
HRB 671194 Amtsgericht Ulm
VAT-Id: DE147815490
Gersbach 10
74589 Satteldorf
Telephone: +49 7950 1345
Telefax: +49 7950 8483
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