Polychrome Jasper (Desert Jasper)
Silicon Dioxide var. Jasper · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal crystal system; microcrystalline/cryptocrystalline habit (massive)
Mineral Group
Silicates (Tectosilicates), Quartz group
Chemical Formula
SiO2 (predominantly) with impurities of Fe2O3 (Iron oxides) and Al, Mg, Ca inclusions
Formation Process
Sedimentary/Hydrothermal: Formed through the deposition of silica from cooling fluids in volcanic ash or sedimentary beds, with metallic impurities creating the varied colors.
About This Crystal
An opaque, microcrystalline variety of quartz. This specimen is carved into a polished hexagonal point (tower), displaying earth tones of sienna, tan, and cream with distinct blue-grey/teal 'landscape' banding. It has a smooth, vitreous to waxy luster.
Physical Characteristics
Color: Multicolored (red, brown, teal, tan); Streak: White; Cleavage: None; Fracture: Conchoidal to splintery; Specific Gravity: 2.58–2.91; Fluorescence: Typically inert.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: 0.009; Pleochroism: None (Opaque); Optical Character: Uniaxial positive.
Hardness & Durability
Origin Region
Exclusively found in the Norbus region of Madagascar; forms in sedimentary or volcanic environments where silica-rich fluids permeate cracks.
Hardness & Durability
Mohs Hardness: 6.5–7. Excellent durability and toughness due to its dense, microcrystalline structure; suitable for all jewelry and decorative uses.
Care & Maintenance
Clean with warm soapy water and a soft brush. Highly stable; resistant to most household chemicals but should be kept away from hydrofluoric acid. Does not typically fade in sunlight.
Rarity & Value
Relatively common but location-specific (Madagascar). Value is determined by the complexity of the color patterns and the quality of the polish. Generally affordable ($10-$50 for small towers).
Special Characteristics
Displays unique 'scenic' or 'landscape' patterns caused by diffusion of iron and other minerals during the stone's formation; non-fluorescent.
Lore & History
Discovered relatively recently (2008) during a search for new deposits of Ocean Jasper. In metaphysical traditions, it is associated with the Root and Sacral chakras and is believed to represent stability, grounding, and the element of fire.