sedimentary
Fancy Jasper
Silicon Dioxide (SiO₂)
Hardness: 6.5-7 (Mohs); Color: Multi-colored (red, green, tan, mauve); Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Multi-colored (red, green, tan, mauve)
- 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: Multi-colored (red, green, tan, mauve); Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica from water in volcanic ash or sedimentary environments. The colors are created by mineral impurities such as iron oxides and chlorite trapped during crystallization.
Uses & applications
Used primarily in lapidary work for cabochons, beads, decorative carvings, and as a collector's gemstone. Also popular in metaphysical and crystal healing communities.
Geological facts
Jasper is a cryptocrystalline variety of quartz. The name 'Fancy Jasper' specifically refers to specimens with a diverse 'rainbow' of mottled colors often found in India.
Field identification & locations
Identify in the field by its high hardness (doesn't scratch with a steel knife), conchoidal fracture (smooth, curved breaks), and opaque appearance. Commonly found in riverbeds and arid regions where volcanic activity occurred.
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