Blue Quartzite
Quartzite var. Blue (Metamorphic Rock containing Quartz and Blue Silicate inclusions) · Decorative Stone / Semi-Precious Gemstone
Crystal System
Trigonal/Hexagonal crystal system; typically occurs in massive or granular habit as a rock
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 (Silicon Dioxide) with inclusions of Na,Ca-rich silicates or Dumortierite/Sodalite traces
Formation Process
Metamorphic; formed from the regional metamorphism of quartz-rich sandstone under high heat and pressure
About This Crystal
A dense, granular rock showing a mottled dusty-to-denim blue color with lighter grey or white patches. It is opaque to translucent with a vitreous to waxy luster.
Physical Characteristics
Color: Indigo to pale blue; Streak: White; Cleavage: None (fractures across grains); SG: 2.6-2.7; Luminescence: Generally inert
Optical Properties
Refractive Index: Approx. 1.544-1.553; Polycrystalline aggregate exhibiting no distinct pleochroism or dispersion
Hardness & Durability
Origin Region
Notable sources include Brazil, Namibia, and India; typically found in metamorphic fold belts
Hardness & Durability
Mohs Hardness: 7; High toughness due to interlocking grain structure; Excellent wearability for jewelry
Care & Maintenance
Safe with warm soapy water; avoid prolonged exposure to harsh chemicals; stable under sunlight and ultrasonic cleaners
Rarity & Value
Common; Value is driven by color saturation and intensity; often used for beads, carvings, and architectural slabs
Special Characteristics
Displays a sugary or granular surface texture; lacks the gold-flecked inclusions (Pyrite) found in Lapis Lazuli
Lore & History
Historically used as a construction stone; in modern lore, it is associated with communication and calm (Throat Chakra)