mineral
Brecciated Jasper
SiO2
AI-generated identification · may be incorrectHardness 6.5-7, orange-red with lighter and darker veining, vitreous to dull luster, microcrystalline structure, conchoidal fracture
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Physical properties
Hardness 6.5-7, orange-red with lighter and darker veining, vitreous to dull luster, microcrystalline structure, conchoidal fracture
Formation & geological history
Formed from fragmented jasper cemented together by a fine-grained matrix, typically composed of silica.
Uses & applications
Used primarily in lapidary arts for cabochons, carved shapes like hearts, beads, and ornamental objects.
Geological facts
The red/orange color is usually due to iron oxide impurities. The 'brecciated' pattern comes from tectonic activity that shattered the original rock, which was then healed by silica-rich fluids.
Field identification & locations
Can be identified by its distinctive fractured and healed pattern along with the typical hardness and opacity of jasper. Common worldwide, but notable deposits exist in the USA and South Africa.
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