Physical Properties of Feldspar Stone / Crystal |
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Chemical Formula: | KALSi308 |
Chemical Composition: | Potassium, sodium and calcium-aluminum silicates |
Crystal System: | Triclinic or monoclinic |
Lustre: | Vitreous |
Transparency: | Translucent to Opaque |
Colour: | Pink, White, Gray, Brown |
Streak: | White |
Hardness: | 6 – 6.5 on Mohs Scale |
Tenacity: | Brittle |
Cleavage: | Good to perfect |
Fracture: | Conchoidal |
Density: | 2.56 |
Refractive Index: | 1.518–1.526 |
Feldspar crystallize from magma in both with intrusive and extrusive igneous rocks. It is also present in metamorphic and sedimentary types of rocks. Feldspar has been derived from a german word which means a rock that does not contains ore. It is made up of group forming tectosilicate minerals that almost covers 60% of the earth's crust. Feldspathic refers to the material which contains feldspar. Rock is almost formed of calcic plagioclase feldspar is known as anorthosite. Its hardness is 6 to 6.5 at moh's scale and its specific gravity leads from 2.55 to 2.76. The crystal system is monoclinic or either triclinic.
This stone helps us to find our eccentric and electrifying ways to accomplish our goals. It supports us in issues like self alertness and self worship. This is stone very ingenious and superior for astronomical voyage. It assists in finding omitted items. It aids in dealing of skin and muscular disarray. It is the birth stone for Aquarius. It persuades one to flow with relationships, situations. It gives the ethereal connections from us to our dear ones which are exceptionally good for maintaining the relationship forever. It is useful for all the chakras.
In earth science and archeology feldspar are used for argon-argon dating, optical dating and thermoluminesence dating. Feldspar is available in various types we can judge the crystals by the edges known as striations. Monoclinic feldspar has striations while triclinic feldspar doesn't.
Albite, Oligoclase, Andesine, Labradorite, Bytownite, Anorthite (10-0% albite, 90-100% anorthite)
Feldspar gemstones / crystals are found in some of the countries of world are: Afghanistan, Antarctica, Austria, Canada, Colombia, Ethiopia, France, Germany, Israel, Italy, Japan, Kazakhstan, Madagascar, Namibia, Norway, Russia, Spain, Sweden, Switzerland, UK, USA