sedimentary

Jasper (specifically Bloodstone/Heliotrope or Dark Green Jasper)

Cryptocrystalline Quartz (SiO2) with inclusions

AI-generated identification · may be incorrect

Hardness: 6.5–7 (Mohs scale); Color: Dark forest green with potential red spots; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6–2.9

Hardness: 6
Color: Dark forest green with potential red spots
Luster: Vitreous to waxy

Identified April 11, 2026More sedimentary →

Explore Jasper (specifically Bloodstone/Heliotrope or Dark Green Jasper) in the encyclopedia →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water solutions into cracks or cavities in sedimentary or volcanic rock. Often found in hydrothermal environments or secondary deposits like riverbeds.

Uses & applications

Used primarily in lapidary work for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for gem collectors and metaphysical practitioners.

Geological facts

In medieval times, the red spots in this stone (known as Bloodstone) were thought to be the blood of Christ. It is a birthstone for March and was traditionally used by Babylonian warriors as amulets for protection.

Field identification & locations

Identify in the field by its high harness (will scratch glass), opaque nature even on thin edges, and smooth, waxy surface when polished or water-worn. Commonly found in India, Brazil, Australia, and the USA.