sedimentary
Red Jasper Pebble
Silicon dioxide (SiO2) with iron inclusions
Hardness: 6.5-7 (Mohs); Color: deep red or reddish-brown; Luster: dull to vitreous; Structure: microcrystalline; Cleavage: none (conchoidal fracture); Opaque.
- Hardness
- 6
- Color
- deep red or reddish-brown
- Luster
- dull to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs); Color: deep red or reddish-brown; Luster: dull to vitreous; Structure: microcrystalline; Cleavage: none (conchoidal fracture); Opaque.
Formation & geological history
Formed through the accumulation of fine-grained silica in sedimentary environments, where iron oxide (hematite) provides the red pigmentation. This specific specimen appears water-worn into a pebble shape, likely in a river or coastal environment.
Uses & applications
Commonly used for tumbled stones, decorative landscaping, bead making, and as a powerful grounding stone in ornamental crystal collecting.
Geological facts
Jasper is an impure variety of silica. The red color is almost always due to iron inclusions. Historically, red jasper was associated with strength and vitality in ancient Egyptian and Roman cultures.
Field identification & locations
Identify by its rich red color, opacity, and smooth, rounded surface indicating fluvial erosion. Commonly found in riverbeds and beaches globally, especially in areas with silica-rich volcanic or sedimentary outcroppings.
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