Crystal Sunstone

Chemical Formula	Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
Color	Red, Orange, Brown, Pink
Hardness	6 - 6.5
Crystal System	Triclinic
Refractive Index	1.525 - 1.548
SG	2.62 - 2.65
Transparency	Transparent to translucent
Double Refraction	0.01
Luster	Vitreous
Cleavage	2,1 - basal ; 2,1 - prismatic ; 3,1 - pinacoidal
Mineral Class	Microcline or Oligoclase