mineral
Feldspar (likely Amazonite or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
AI-generated identification · may be incorrectHardness: 6-6.5 on Mohs scale. Color: Pale blue-green to creamy white with tan weathering. Luster: Vitreous to pearly. Crystal Structure: Triclinic or Monoclinic. Cleavage: Two directions at approximately 90 degrees.
- Hardness
- 6-6
- Color
- Pale blue-green to creamy white with tan weathering
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-6.5 on Mohs scale. Color: Pale blue-green to creamy white with tan weathering. Luster: Vitreous to pearly. Crystal Structure: Triclinic or Monoclinic. Cleavage: Two directions at approximately 90 degrees.
Formation & geological history
Formed in plutonic igneous rocks like granite and pegmatites, as well as metamorphic rocks. This specimen likely originates from a coarse-grained pegmatite vein.
Uses & applications
Used in the manufacture of glass and ceramics, as a filler in paint and rubber, and occasionally as a gemstone (amazonite) or for ornamental carvings.
Geological facts
Feldspar is the most abundant mineral group in Earth's crust, making up about 60% of its surface rocks. The blue-green variety is known as Amazonite.
Field identification & locations
Identify by its rectangular blocky shape due to right-angle cleavage and its pearly luster on fresh surfaces. Found globally in granitic terrains.
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