Jasper
Jasper is opaque microcrystalline quartz, often containing mineral inclusions that create stunning patterns — landscapes, clouds, forests, and abstract designs. Oregon's Biggs and Picture Jaspers are among the most visually spectacular lapidary materials in the world. It's one of the most popular materials for rockhounds who do lapidary work.
Physical Properties
Chemical Formula
SiO₂ (opaque chalcedony)
Hardness (Mohs)
6.5–7
Color
Red, yellow, brown, green, multicolor
Luster
Dull to waxy
Crystal System
Hexagonal (microcrystalline)
Streak
White
Cleavage
None
Specific Gravity
2.58–2.91
🔍 Field Identification Tips
Opaque (no light transmission) separates jasper from agate. Waxy to dull luster. Hardness 6.5–7. The patterns are the key feature — no two pieces are alike. Breaks with conchoidal fracture.
Varieties & Forms
📍 Where to Find Jasper in the US
Uses & Applications
Cabochons, lapidary work, carvings, bookends, decorative slabs. Extremely popular with gem cutters.
💰 Collector Value Guide
Raw: $2–$20/lb. Premium picture jasper rough: $10–$100/lb. Cut cabochons: $10–$200 each depending on pattern quality.
Find Jasper With Our Tools
Use the We Lick Rocks app to identify specimens, find dig sites, and connect with local rockhounds.