sedimentary
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite
Hardness: 6.5-7 on Mohs scale; Color: Dark green with red spots or streaks; Luster: Vitreous to waxy; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58-2.64
- Hardness
- 6
- Color
- Dark green with red spots or streaks
- Luster
- Vitreous to waxy
Identified More sedimentary →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Dark green with red spots or streaks; Luster: Vitreous to waxy; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58-2.64
Formation & geological history
Formed through the deposition of silica from groundwater in the cavities of volcanic or sedimentary rocks at low temperatures. Common in various geological environments but predominantly associated with igneous extrusive rocks as secondary minerals.
Uses & applications
Commonly used in lapidary work, jewelry (especially signet rings or pendants), cabochons, and small ornamental carvings. Often collected as a healing stone in metaphysical practices.
Geological facts
Also known as Heliotrope, which means 'sun turner' in Greek. Legend says the red spots formed when Christ's blood fell upon a piece of jasper at the foot of the cross. It is the original birthstone for March.
Field identification & locations
Identify by its characteristic dark green opaque body and distinct red/orange 'blood' spots of iron oxide (hematite). Commonly found in India, Brazil, Australia, and Germany. Collectors look for high contrast and vibrant red spotting.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary