Polychrome Jasper (Desert Jasper)
Silicon Dioxide (Microcrystalline Quartz variety Jasper) · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal (Hexagonal) system; occurs in a microcrystalline or cryptocrystalline habit (massive)
Mineral Group
Silicates (Tectosilicates / Chalcedony group)
Chemical Formula
SiO2 (Silicon Dioxide) + Fe2O3 (Iron Oxide) and other mineral impurities
Formation Process
Large-scale sedimentary or hydrothermal deposition of silica-rich fluids within volcanic ash or clay beds, colored by iron oxides.
About This Crystal
An opaque, microcrystalline variety of quartz featuring earthy tones of brown, tan, and dark grey-black. It displays a smooth, vitreous to waxy luster and characteristic flowing, desert-like color banding or 'panting' patterns.
Physical Characteristics
Colors: Earthy browns, tans, and charcoal; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58 - 2.91; Fluorescence: Typically inert (none).
Optical Properties
Refractive Index: 1.544 - 1.553; Opaque (no light transmission through center); Singly refractive (aggregate); No pleochroism.
Hardness & Durability
Origin Region
Madagascar (specifically the desert regions of the Northwest coast)
Hardness & Durability
Mohs Hardness: 6.5 to 7. Great toughness and durability; excellent for jewelry and heavy handling.
Care & Maintenance
Clean with warm soapy water and a soft brush. Avoid harsh chemicals and ultrasonic cleaners, though generally stable. Store separately to prevent scratching softer stones.
Rarity & Value
Common; Value is determined by the aesthetic appeal of the color patterns and the quality of the polish. Generally inexpensive.
Special Characteristics
Distinctive swirling, 'scenic' patterns that resemble landscapes or desert dunes; highly variegated color distribution within a single specimen.
Lore & History
Discovered in Madagascar in 2006. Traditionally associated with the Root Chakra; historically, jaspers were known as 'supreme nurturers' used for grounding and protection in various ancient cultures.