mineral
Fancy Jasper
Silicon Dioxide (SiO2) with impurities
AI-generated identification · may be incorrectHardness: 6.5-7 Mohs; Color: Forest green, mauve, burgundy, and tan; Luster: Vitreous to waxy (when polished); Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Forest green, mauve, burgundy, and tan
- Luster
- Vitreous to waxy (when polished)
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Physical properties
Hardness: 6.5-7 Mohs; Color: Forest green, mauve, burgundy, and tan; Luster: Vitreous to waxy (when polished); Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica in cavities of volcanic rocks or sedimentary environments. The vibrant colors are caused by varying levels of mineral inclusions like hematite for reds and chlorite for greens.
Uses & applications
Primarily used for lapidary work, jewelry making (beads/cabochons), interior decoration (spheres/bookends), and as a metaphysical aid in crystal collecting.
Geological facts
Fancy Jasper is often called the 'stone of tranquility' in spiritual circles. Because it is an opaque variety of chalcedony, every specimen contains a unique, non-repeating pattern of colors.
Field identification & locations
Identify by its complete opacity, smooth waxy texture, and multi-colored mottled appearance. Commonly sourced from India, Brazil, and South Africa.
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Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary