Orthoclase Gallery

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Orthoclase : K[AlSi₃O₈], Muscovite : KAl₂[(OH)₂\|AlSi₃O₁₀], Quartz (Var: Smoky Quartz) : SiO₂
	Lake Boga granite quarry, Lake Boga, Victoria, Australia Orthoclase crystals, pale amber in colour, with muscovite and smoky quartz from a cavity in the granite. The muscovite in particular seems to have a whitish clay mineral coating. The length of the orthoclase crystal is 15mm.
© Judy Rowe	Photo ID: 235775 View Count: 65
Orthoclase : K[AlSi₃O₈]
	São Paulo, Southeast Region, Brazil Orthoclase Crystals exhibiting perfect Carlsbad interpenetration Twin. Size 2.5x2.5x1cm. Rafael Hernandes Corrêa-Silva Collection.
© Brhounds	Photo ID: 49418 View Count: 358
Orthoclase : K[AlSi₃O₈]
	Penticton, Osoyoos Mining Division, British Columbia, Canada A PERFECT, simple, tan orthoclase crystal from a UNIQUE Canadian locality - Penticton in British Columbia. The piece looks like it was carved from soapstone, even with a trivial corner bruise. The specimen comes with an old Wards label. Ex Carl Davis Collection. 5.9 x 3.6 x 2.6 cm
© Rob Lavinsky	Photo ID: 66846 View Count: 289
Orthoclase : K[AlSi₃O₈]
	Shingle Creek, Penticton, Osoyoos Mining Division, British Columbia, Canada A 7.8 by 5.6 cms specimen with a large crystal self collected in the 1980's. JSS specimen and photograph.
© JSS	Photo ID: 75235 View Count: 206
Orthoclase : K[AlSi₃O₈]
	Princess Sodalite Quarry (Princess Quarry), Dungannon Township, Bancroft District, Hastings Co., Ontario, Canada Cluster of many intersecting white feldspar crystals. Very sculptural formation. No damage. Collected by Stevenson in August 1969. Ex. A. Stevenson collection #368. Overall size of mineral specimen: 28x17x15 mm. Size of individual crystals: 4-15 mm.
© 2001 John H. Betts	Photo ID: 2959 View Count: 662
Orthoclase : K[AlSi₃O₈], Scapolite
	Khartum, Griffith, Greater Madawaska Township, Renfrew Co., Ontario, Canada An aesthetic and excellent cluster of sharp, euhedral, burnt-orange orthoclase after scapolite crystals from an uncommon Canadian locality in Griffith Township, Ontario. The central, primary crystal is undamaged. Ex Richark Hauck Collection. 5.6 x 3.4 x 3.3 cm
© Rob Lavinsky	Photo ID: 53868 View Count: 253
Orthoclase : K[AlSi₃O₈]
	Spain Mine, Khartum, Griffith, Greater Madawaska Township, Renfrew Co., Ontario, Canada An excellent crystal of burnt-orange orthoclase after scapolite from an uncommon Canadian locality, the Spain Mine, Griffith Township, Ontario. 60 x 35 x 25 mm. Crystal-Odyssey specimen. gemcrystals @aol.com
© Joseph A. Freilich	Photo ID: 87968 View Count: 181
Orthoclase : K[AlSi₃O₈]
	Renfrew, Renfrew Co., Ontario, Canada This is a 1 x2 inch pseudomorph of orthoclase after scapolite from Tr 41 in Renfrew Co. In the Charles Creekmur collection.
© Charles Creekmur	Photo ID: 18290 View Count: 386
Orthoclase : K[AlSi₃O₈]
	Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile Irregular twinned crystals of orthoclase. Though one of the crystals has a complex termination with uncommon shape, the intersecting twinned crystals of the Carlsbad-law are easily visible. No damage. Ex. Robert C. Linck (1905-1970). Overall size of mineral specimen: 3x3x3 cm. Size of individual crystals: 3 cm.
© 2003 John H. Betts	Photo ID: 9980 View Count: 561
Orthoclase : K[AlSi₃O₈]
	Bohemia (Böhmen; Boehmen), Czech Republic 3.9 x 3.1 x 1.9 cm. An old-time and classic Carlsbad-twinned orthoclase crystal from Bohemia, Czech Republic. This very sharp, tan crystal has textbook twinning and is very nearly pristine, with only a bit of contacting on one edge. Accompanied by an old German label. Certainly around a 100 years old or more. Ex. Wilhelm Leithauser Collection.
© Rob Lavinsky	Photo ID: 159492 View Count: 109