Picture Jasper
Quartz (Variety: Jasper) · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal/Hexagonal; typically microcrystalline/cryptocrystalline (Massive habit)
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 (Silicon Dioxide with Iron Oxide and Clay inclusions)
Formation Process
Sedimentary/Hydrothermal; formed when silica-rich fluids permeate volcanic ash or fine-grained sediments, petrifying them over time.
About This Crystal
Opaque, microcrystalline quartz featuring tan, brown, and black banding. The tumbled specimen displays a smooth, vitreous to waxy luster with 'scenic' or 'landscape' patterns caused by iron oxide impurities.
Physical Characteristics
Color: Tan/Brown earthy tones; Streak: White; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58–2.91; Fluorescence: Generally none.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: None (aggregate); Pleochroism: None; Dispersion: Low; Opaque transparency.
Hardness & Durability
Origin Region
Primarily Oregon, USA (Blue Mountain, Biggs), Africa, and Brazil; forms in volcanic ash or sedimentary beds.
Hardness & Durability
Mohs Hardness: 6.5–7; High toughness; excellent stability; very durable for daily jewelry wear.
Care & Maintenance
Clean with warm soapy water and soft brush; avoid harsh chemicals and ultrasonic cleaners if the stone is porous or dyed. Store separately to avoid scratching softer gems.
Rarity & Value
Common; Value is determined by the complexity/beauty of the 'picture' patterns. Generally inexpensive ($1–$20 for tumbled stones).
Special Characteristics
Dendritic or flow-like patterns that resemble landscapes, mountains, or wood grain; high iron content provides the brown-black coloration.
Lore & History
Historically used by indigenous peoples for talismans; traditionally associated with 'Earth energy,' grounding, and global awareness in metaphysical lore.