Zebra Jasper
Quartz var. Jasper (Microcrystalline Quartz) · Decorative Stone and Semi-Precious Gemstone
Crystal System
Trigonal (Microcrystalline / Cryptocrystalline, massive habit)
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2
Formation Process
Sedimentary or hydrothermal precipitation of silica-rich solutions in rock cavities or cracks, often with iron oxide and other mineral impurities causing distinctive striping during diagenesis.
About This Crystal
Tumbled, polished smooth specimen displaying a striking high-contrast pattern of opaque white, gray, and dark black or charcoal stripes and veining. The luster is vitreous to waxy due to the tumbling and polishing process.
Physical Characteristics
Colors include white, gray, and black. Streak is white. Cleavage is none due to microcrystalline structure. Fracture is conchoidal to uneven. Specific gravity is approximately 2.58 to 2.91. Tenacity is brittle. Non-magnetic and generally unreactive to UV light.
Optical Properties
Singly refractive (microcrystalline aggregates appear as aggregate under polariscope), isotropic to anomalous aggregate interference figures. Birefringence is very low. Pleochroism is absent.
Hardness & Durability
Origin Region
Found globally with notable deposits in India, South Africa, Russia, and the USA. Typically forms in sedimentary environments and silica-rich hydrothermal veins.
Hardness & Durability
Mohs hardness of 6.5 to 7. Toughness is good due to the interlocking microcrystalline quartz structure. Stable under normal environmental conditions.
Care & Maintenance
Clean with warm soapy water and a soft cloth. Avoid harsh chemical cleaners and prolonged exposure to direct sunlight to preserve surface polish. Store separately from softer stones.
Rarity & Value
Common and widely available. Value depends on the aesthetic appeal of the pattern, polish quality, and size. Typically affordable and rarely subjected to major treatments beyond standard tumbling and polishing.
Special Characteristics
Distinctive zebra-like banding and webbed patterns caused by alternating layers of silica and mineral inclusions such as hematite or carbonaceous matter.
Lore & History
Popular in modern crystal healing as a stone of balance, endurance, and grounding, traditionally associated with the root and crown chakras to harmonize physical and spiritual energies. These are cultural beliefs and not scientifically validated.