Zebra Jasper
Quartz var. Jasper (Microcrystalline Quartz / Chalcedony) · Decorative Stone and Semi-Precious Gemstone
Crystal System
Trigonal, with a microcrystalline/massive habit
Mineral Group
Silicates (specifically Tectosilicates)
Chemical Formula
SiO2
Formation Process
Sedimentary or hydrothermal precipitation of silica-rich fluids filling cavities and fractures, solidifying into microcrystalline quartz
About This Crystal
An opaque, polished smooth oval tumbled stone featuring a distinctive high-contrast pattern of dark charcoal-black and crisp white areas with intermingling shades of grey, displaying a waxy to vitreous luster
Physical Characteristics
Body color is black and white, white streak, massive habit with no distinct cleavage, uneven to conchoidal fracture, specific gravity around 2.65, brittle tenacity, non-magnetic, and generally non-fluorescent
Optical Properties
Singly refractive aggregate under polariscope, aggregate refractive index around 1.540 to 1.554, no pleochroism, and opaque transparency limiting internal optical phenomena
Hardness & Durability
Origin Region
Found globally with notable deposits in India, Russia, South Africa, and the USA; forms in sedimentary and volcanic environments
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness due to interlocking microcrystalline structure, stable under normal wear, suitable for casual jewelry
Care & Maintenance
Clean with warm soapy water and a soft cloth, avoid harsh chemical cleaners and prolonged exposure to direct sunlight, store separately from harder gems like corundum to prevent scratching
Rarity & Value
Common and widely available, value depends on the distinctiveness of the pattern and polish, typically very affordable in tumbled and polished forms with no common enhancements needed
Special Characteristics
Noted for its striking natural contrasting color banding and patterns mimicking animal pelts, formed by complex mineral impurity distributions during silica gel precipitation
Lore & History
Often used in modern crystal healing practices as a grounding stone associated with the root chakra, believed to promote emotional balance and endurance, though these are traditional beliefs rather than scientific claims