Orthoclase
.
Orthoclase
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 |