Blue Quartz
Quartz var. Blue Quartz · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal; commonly occurs in massive or tumbled form as seen here
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 (Silicon Dioxide) with inclusions of Dumortierite or Magnesio-riebeckite
Formation Process
Magmatic crystallization or hydrothermal processes where quartz grows alongside blue mineral inclusions
About This Crystal
A tumbled, translucent to opaque stone with a dusty or denim blue color. It exhibits a vitreous luster when polished and contains fine, needle-like mineral inclusions that give it its blue hue
Physical Characteristics
Color: Blue; Streak: White; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.65; Fluorescence: Generally inert
Optical Properties
Refractive Index: 1.544-1.553; Birefringence: 0.009; Doubly refractive; typically lacks pleochroism due to the nature of inclusions
Hardness & Durability
Origin Region
Notably Brazil, Madagascar, and the USA (Virginia); found in various metamorphic and igneous environments
Hardness & Durability
Mohs Hardness: 7; Highly durable stone with good toughness, suitable for daily jewelry wear
Care & Maintenance
Clean with warm soapy water and a soft brush; safe for ultrasonic cleaning but avoid high heat or harsh chemicals
Rarity & Value
Common; generally affordable with value driven by color saturation and size; rarely treated except for occasional dyeing
Special Characteristics
Features internal 'clouds' or fine inclusions of blue silicate minerals; does not display the optical play-of-color found in blue sapphire
Lore & History
Historically used as a decorative stone in many cultures; traditionally associated with the Throat Chakra in crystal healing to promote communication and calm