mineral
Bloodstone
Chalcedony quartz variety (SiO2) with inclusions
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, dark green color with distinct red or brown spots of jasper or hematite, vitreous to waxy luster, microcrystalline crystal structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
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Physical properties
Mohs hardness of 6.5 to 7, dark green color with distinct red or brown spots of jasper or hematite, vitreous to waxy luster, microcrystalline crystal structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
Formation & geological history
Forms in hydrothermal veins and cavities in low-temperature conditions, often by the deposition of silica in groundwater within volcanic or sedimentary rocks. Can be millions of years old.
Uses & applications
Popularly used in jewelry, cabochons, carved items, and as a collector's specimen.
Geological facts
Historically known as the martyr stone due to legends stating the red spots were formed from the blood of Jesus Christ falling on green jasper at the crucifixion.
Field identification & locations
Easily identified by its deep green base color combined with opaque red spots. Commonly found in India, Brazil, Australia, and the USA. Look for good contrast between the green and red colors.
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