Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- South Betroka, Madagascar
- Formula
- K(AlSi3)O8
- Size
- Miniature 4x3x3cm
Excellent glassy light yellowish green, gemmy total crystal.
- Availability
- Sold
- Locality
- Potosi, Bolivia
- Formula
- K(AlSi3)O8
- Size
- SmCabinet 3.5x7x1cm
- Tagged
- twinned crystal
Cream colored twinned Orthoclase crystal that is a textbook example of a Carlsbad twin with interpenetrating sections seperated by a single plane. There are also a couple Pyrite cubes to 3-4mm partially embedded in the Orthoclase, adding to the oddness of the piece.
- Availability
- Sold
- Locality
- Skardu dist., Balistan, Northern Areas, Pakistan
- Formula
- K(AlSi3)O8
- Size
- SmCabinet 6x4x3cm
- Special Info
- EDS Confirmed
Colorless, impressive crystal of Orthoclase showing four large faces and a cleavage plane. If you haven't a good feldspar crystal in your collection, you might consider this one - EDS confirmed.
- Availability
- Sold
- Locality
- Hirukawa, Gifu Pref., Chubu, Honshu Island, Japan
- Formula
- K(AlSi3)O8
- Size
- SmCabinet 6x6x2.5cm
Nice cluster of white Orthoclase crystals topped with orange Chabazite deposited preferentially by crystal face. Note the graphitic texture on the backside, a hallmark of a pegmatite deposit. Note label.
- Availability
- Sold
- Locality
- Valenciana mine, Guanajuato, Mexico
- Formula
- K(AlSi3)O8
- Size
- Cabinet 10x7.5x3cm
Lustrous white rhombs of white "valencianite", a variety of adularia, a variety of Orthoclase.
- Availability
- Sold
- Locality
- Valenciana mine, Guanajuato, Mexico
- Formula
- K(AlSi3)O8
- Size
- SmCabinet 7.5x7.5x4cm
Snow white crystals of Orthoclase variety adularia. Crystal reach 6cm and are terminated with a glossy and porcelain-like luster. Tiny crystals of an unknown mineral causes the orange color.
