About Feldspar
A large group of rock-forming tectosilicate minerals, making up a large part of Earth's crust. Generally, feldspars are associated with creativity, self-awareness, and support during times of change. Specific types have unique properties.
Primary Hues
Various: White, Pink, Grey, Green, Blue, Yellow, Red, Brown, Colorless, often with cleavage and specific optical effects
Geological & Scientific Details
Feldspar is classified as a tectosilicate mineral which typically crystallizes in the triclinic or monoclinic system. Its chemical formula is KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8.
Key Geological Properties:
- Mineral Category: Tectosilicate
- Chemical Formula: KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8
- IMA Symbol: Fsp[1]
- Crystal System: Triclinic or monoclinic
- Predominant Geological Color: pink, white, gray, brown, blue
- Cleavage: two or three
- Luster: Vitreous
- Streak: white
- Diaphaneity: opaque
Associated Minerals
- Orthoclase
- Microcline (Amazonite)
- Sanidine (Alkali Feldspars)
- Albite
- Oligoclase
- Andesine
- Labradorite
- Bytownite
- Anorthite (Plagioclase Feldspars)
- Quartz
- Mica
- Amphibole (major components of many rocks)