Alkali Feldspar
Alkali Feldspar Group
A variety of Feldspar Group
What is Alkali Feldspar?
Alkali Feldspar, a subgroup of feldspar minerals, encompasses a range of potassium-rich and calcium-poor minerals, including orthoclase and microcline. Alkali Feldspar is an essential component of many igneous rocks, exhibiting a diverse color palette from white and pink to green and gray. Alkali Feldspar is widely used in the production of decorative stones, ceramics, and as a gemstone in jewelry due to its lustrous appearance and durability.
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Alkali Feldspar Localities Map
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Quick Facts
Physical Properties
- Color
- White to gray or colorless, greenish white, grayish yellow, pale pink, tan, bluish green, green, etc.
- Hardness (Mohs)
- 6 - 6.5
- Density
- 2.5 - 2.6 g/cm³
- Streak
- White
- Luster
- Vitreous
- Crystal System
- Monoclinic, Triclinic
Chemical Properties
- Chemical Formula
- K(AlSi₃O₈)
- Elements
- Al,K,Na,O,Si
Also Known As
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