Orthoclase -- Shigar Valley, Skardu District, Baltistan, Pakistan Two large, very sharp, lustrous white orthoclase crystals on a massive orthoclase base covered in thick tablets of mica, small black schorl crystals and a few very light pink apatite crystals. The orthoclase crystals are Baveno law twins.
Amazonite, K(AlSi3O8), (=Microcline) and Smoky Quartz, Colorado, USA. Photo Joaquim Callén
Sanidine, (K,Na)(Si,Al)4O8, (var. Azulicite) Mina La Pili, Chihuahua, Mexique. (3.5x2.2 cm)
Riebeckite, [ ]Na2(Fe++3Fe+++2)Si8O22(OH)2 , amphibole group, Zagi Mountain, Khyber Pakhtunkhwa, Pakistan. A superb group of lustrous black crystals of this very rare species, to 3.3 cm, perched on a granite matrix. A small reddish-brown Bastanite xl is nestled amidst the group. Although Riebeckite is a common black rock-forming mineral at the deposit , it is very uncommon as crystallized specimens
Topaz on Albite from Shigar Valley, Skardu Dist., Pakistan
Orthose (orthoclase), KAlSi3O8, rose (mâcle), Saint Babel, Puy de Dôme, France
Orthoclase / Pakistan I love crystals that grow in a geometricly unique way!