Red Jasper
Quartz var. Jasper · Decorative Stone and Mineral Specimen
Crystal System
Trigonal, microcrystalline, massive habit
Mineral Group
Silicates, Tectosilicates
Chemical Formula
SiO2
Formation Process
Sedimentary or hydrothermal deposition, silica-rich fluids replacing host rock or precipitating in cavities, typically at low to moderate temperatures and pressures
About This Crystal
An opaque, microcrystalline variety of quartz exhibiting a brownish-red to brick-red color with minor white quartz or chalcedony veining and an earthy to waxy luster
Physical Characteristics
Brick-red to reddish-brown body color, white streak, no cleavage, distinctly conchoidal fracture, specific gravity around 2.65, brittle tenacity, non-magnetic
Optical Properties
Refractive index of approximately 1.544 to 1.553, doubly refractive, isotropic aggregate under crossed polars, opaque with no pleochroism
Hardness & Durability
Origin Region
Found worldwide including India, Brazil, Russia, Madagascar, and the United States; forms in sedimentary and volcanic environments
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness due to microcrystalline interlocking structure, stable under normal environmental conditions, excellent for jewelry wear
Care & Maintenance
Clean with warm soapy water and a soft brush, avoid harsh chemical cleaners, store away from harder gemstones to prevent scratching, highly stable in sunlight
Rarity & Value
Common and widely available, value depends mainly on cut, polish, and unique patterning, typically inexpensive unless part of a high-end decorative carving
Special Characteristics
Contains iron oxide inclusions which give it the characteristic red coloration, sometimes exhibits interesting banding or brecciated patterns
Lore & History
Historically used by ancient civilizations including the Egyptians and Native Americans for amulets, seals, and weapons; traditionally associated with grounding, vitality, and the root chakra in modern crystal lore