Jasper
Quartz var. Jasper · Decorative Stone and Mineral Specimen
Crystal System
Trigonal, massive or microcrystalline habit
Mineral Group
Silicates - Tectosilicates
Chemical Formula
SiO2
Formation Process
Hydrothermal deposition or chemical precipitation in sedimentary environments, often replacing organic material or filling cavities
About This Crystal
An opaque, microcrystalline variety of quartz presenting as a rounded, earthy brownish-red pebble with rough surface texture and minor mineral inclusions
Physical Characteristics
Brownish-red body color, white streak, conchoidal fracture, lack of distinct cleavage, specific gravity around 2.65, opaque transparency, dull to waxy luster
Optical Properties
Singly refractive aggregate, optically isotropic overall due to microcrystalline structure, no pleochroism
Hardness & Durability
Origin Region
Worldwide, including India, Brazil, Russia, and the USA; found in sedimentary and volcanic deposits
Hardness & Durability
Mohs hardness of 6.5 to 7, excellent toughness and durability for general handling and jewelry use
Care & Maintenance
Clean with warm soapy water, store separately from softer stones, resistant to most household chemicals and sunlight
Rarity & Value
Very common worldwide, low to moderate value depending on unique patterns, colors, and polish
Special Characteristics
Often features intricate natural banding, web-like patterns, or mineral impurities resulting from iron oxides
Lore & History
Historically used by ancient civilizations for amulets, talismans, and tools; traditionally associated with grounding, stability, and the root chakra