sedimentary
Red Jasper
Opaque microcrystalline quartz (SiO2) with Hematite inclusions
Hardness: 6.5-7.0 on Mohs scale; Color: Deep Brick Red to Reddish-Brown; Luster: Vitreous to Waxy (when polished); Crystal Structure: Hexagonal/Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91.
- Hardness
- 6
- Color
- Deep Brick Red to Reddish-Brown
- Luster
- Vitreous to Waxy (when polished)
Identified More sedimentary →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7.0 on Mohs scale; Color: Deep Brick Red to Reddish-Brown; Luster: Vitreous to Waxy (when polished); Crystal Structure: Hexagonal/Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91.
Formation & geological history
Formed primarily in sedimentary environments where silica-rich fluids permeate porous rock or volcanic ash, with the red color derived from iron oxide (hematite) inclusions. It can also form during hydrothermal processes.
Uses & applications
Commonly used in jewelry (cabochons, beads), decorative carvings, lapidary art, and as a healing stone in metaphysical practices. Historically used for tools and seals.
Geological facts
Red Jasper is known as a stone of endurance and nurturing. It has been used since antiquity; the ancient Egyptians used it in amulets to enhance fertilty and protection.
Field identification & locations
Identify in the field by its opaque nature (unlike Carnelian which is translucent), its smooth conchoidal fracture, and rich red streak. Frequently found in riverbeds or as nodules in volcanic regions like Brazil, India, and the USA.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Arenite
sedimentary