Quartzite
Quartzite · Mineral Specimen / Decorative Stone
Crystal System
Trigonal (individual quartz grains); massive or granular habit
Mineral Group
Silicates
Chemical Formula
SiO2
Formation Process
Metamorphic, formed when quartz-rich sandstone or chert is subjected to high temperatures and pressures, usually through regional metamorphism.
About This Crystal
The specimen is a granular, coarse-textured rock with a brownish-gold and tan surface coloration, showing minor translucent quartz grains and reflective flecks indicating intergrown mineral matrices.
Physical Characteristics
Color ranges from white to gray, yellow, brown, and reddish due to iron oxide impurities. Streak is white. Fracture is splintery to uneven. Specific gravity is approximately 2.65.
Optical Properties
Birefringence is low (0.009), aggregate nature shows a general dull to sub-vitreous sparkle on freshly broken crystalline surfaces.
Hardness & Durability
Origin Region
Found worldwide, including the USA, Canada, Brazil, and parts of Europe, typically formed in regional metamorphic belts.
Hardness & Durability
Mohs hardness of 7, excellent durability, highly resistant to weathering and chemical attack, making it unsuitable for easy scratching.
Care & Maintenance
Wash with warm soapy water and a soft brush. Highly durable and chemically resistant.
Rarity & Value
Common, widely distributed globally. Inexpensive as a raw mineral specimen, though decorative varieties can vary.
Special Characteristics
Exceptional durability, interlocking quartz mosaic texture providing high resistance to thermal and mechanical weathering.
Lore & History
Historically used for primitive stone tools and modern construction. In metaphysical lore, quartzite is associated with perseverance, inner strength, and overcoming physical and emotional obstacles.