mineral

Red Jasper (or Banded Jasper)

Silicon Dioxide (SiO2 with Hematite impurities)

Hardness: 6.5 - 7 on Mohs scale. Color: Brick red to brownish-red with subtle banding and yellowish tones. Luster: Dull to vitreous or waxy. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline quartz). Cleavage: None (conchoidal fracture). Specific Gravity: ~2.65.

Hardness: 6
Luster: Dull to vitreous or waxy

Identified July 26, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich fluids in sedimentary or hydrothermal environments where iron oxides (hematite) are present, giving it the distinctive red coloration. Often associated with ancient volcanic or sedimentary rocks.

Uses & applications

Popular for lapidary work, tumbling, cabochons, decorative carving, rock tumbling, and ornamental landscaping stones.

Geological facts

Red jasper has been used since antiquity for seals, amulets, and decorative items. Its red color is directly caused by fine inclusion particles of hematite dispersed throughout the quartz matrix.

Field identification & locations

Look for a microcrystalline texture with smooth conchoidal fractures, opaque clarity, and distinct iron-red hues with potential micro-banding. It is commonly found in gravel deposits, riverbeds, and weathered basalt or sedimentary formations worldwide.

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