sedimentary
Red Jasper
Jasper (Silicon Dioxide with Hematite inclusions), SiO2
Hardness: 6.5-7 (Mohs); Color: Deep opaque red to reddish-brown; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None (Conchoidal fracture); Specific gravity: 2.58-2.91.
- Hardness
- 6
- Color
- Deep opaque red to reddish-brown
- 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 (Mohs); Color: Deep opaque red to reddish-brown; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None (Conchoidal fracture); Specific gravity: 2.58-2.91.
Formation & geological history
Formed through the deposition of silica from hydrothermal solutions or in sedimentary environments. Its red color is derived from iron (hematite) inclusions incorporated during the silicification process.
Uses & applications
Commonly used in jewelry (cabochons, beads), decorative carvings, lapidary art, and as a popular healing stone in metaphysical communities.
Geological facts
Jasper has been used as a gemstone since antiquity; it was mentioned in the Bible and used by ancient Egyptians for amulets. It is an opaque variety of chalcedony.
Field identification & locations
Identify by its rich red color, opacity (it does not transmit light even on thin edges), and its ability to scratch glass. Commonly found in India, Brazil, Madagascar, and the USA.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Arenite
sedimentary