sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5–7 on Mohs scale; Color: Terracotta red to deep reddish-brown; Luster: Dull/Waxy; Crystal Structure: Microcrystalline trigonal (cryptocrystalline quartz); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.58–2.91

Hardness: 6
Color: Terracotta red to deep reddish-brown
Luster: Dull/Waxy

Identified March 29, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation of fine-grained silica in sedimentary environments or hydrothermal veins. The red color is caused by iron (hematite) inclusions within the silica matrix. These can originate from any geological era since the Archean.

Uses & applications

Commonly used for lapidary work, jewelry (cabochons and beads), decorative ornaments, and as a powerful grounding stone in crystal healing practices.

Geological facts

Jasper was a favorite gem in the ancient world, mentioned in the Bible as a stone in the Breastplate of Aaron. Red Jasper specifically is often called the 'Stone of Endurance' and has been used for centuries to carve seals and amulets due to its toughness.

Field identification & locations

Identify in the field by its opaque reddish appearance, conchoidal fracture (curved, glass-like breaks), and high hardness—it will easily scratch glass. Found globally in areas with volcanic or sedimentary quartz deposits, commonly in riverbeds and arid landscapes.