Quartz
Quartz (alpha-quartz) · Mineral Specimen / Semi-Precious Gemstone
Crystal System
Trigonal; typically prismatic with pyramidal terminations, often found as massive or druzy aggregates.
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 (Silicon Dioxide)
Formation Process
Primary formation through hydrothermal veins and cooling of silica-rich magma (igneous). Also occurs in metamorphic and sedimentary environments.
About This Crystal
The specimen is a crystalline aggregate of colorless to white quartz. It appears semi-translucent with a vitreous to greasy luster on fracture surfaces. Small granular crystal faces are visible, creating a druzy or saccharoidal (sugary) texture. Many tiny dark inclusions (possibly carbonaceous material or oxides) are scattered throughout the body.
Physical Characteristics
Color: Colorless/White; Streak: White; Hardness: 7; Fracture: Conchoidal to uneven; Specific Gravity: 2.65; Luster: Vitreous; Diaphaneity: Translucent; Fluorescence: Generally inert.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: 0.009 (uniaxial positive); Pleochroism: None; Dispersion: 0.013. This material is doubly refractive.
Hardness & Durability
Origin Region
Found globally; notable sources include Brazil, Arkansas (USA), Madagascar, and the Alps.
Hardness & Durability
Mohs Hardness: 7. Excellent durability and toughness for jewelry as it lacks cleavage; stable under light and most everyday chemicals.
Care & Maintenance
Safe to clean with warm soapy water, ultrasonic cleaners, and steam. Store away from diamonds or corundum which can scratch it, though it is resistant to most household scratches.
Rarity & Value
Common and abundant. Value for this specific raw specimen is low, primarily as a collector mineral or for lapidary use. Price is typically determined by weight and clarity.
Special Characteristics
Features a sugary (saccharoidal) texture and tiny dark speck-like inclusions. Piezoelectric and pyroelectric properties are present in the crystal structure.
Lore & History
Historically used for stone tools and ritual objects across all continents. In traditional lore, it is often called the 'Master Healer' and associated with the Crown Chakra, believed to amplify energy and clarity.