Sedimentary/Mineral
Jasper
Cryptocrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5-7, opaque, various colors often with patterns, vitreous to dull luster, cryptocrystalline, conchoidal fracture
Identified More sedimentary/mineral →
Explore Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 6.5-7, opaque, various colors often with patterns, vitreous to dull luster, cryptocrystalline, conchoidal fracture
Formation & geological history
Formed from silica-rich sedimentary environments or volcanic ash deposits, often with impurities like iron oxide creating patterns.
Uses & applications
Commonly used in lapidary, jewelry making, ornamental objects, and crystal healing.
Geological facts
The specific pattern on this piece is often called 'orbicular' or 'poppy' jasper due to the spotty inclusions. Jasper is an aggregate of microgranular quartz and/or chalcedony.
Field identification & locations
Identified by its opacity, hardness (can scratch glass), and characteristic patterns. Found worldwide, often in areas with volcanic history.
More like this
Other sedimentary/mineral specimens
Small weathered mineral/rock fragment
Indeterminate; possibly quartz-bearing feldspathic rock or calcite-rich specimen
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral