metamorphic
Jasper and Epidote Breccia
Silicified Brecciated Rock with Epidote
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, multicolored with prominent reddish-brown jasper fragments cemented by greenish epidote, cryptocrystalline crystal structure, uneven fracture, specific gravity around 2.6 to 2.9.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, multicolored with prominent reddish-brown jasper fragments cemented by greenish epidote, cryptocrystalline crystal structure, uneven fracture, specific gravity around 2.6 to 2.9.
Formation & geological history
Formed through hydrothermal activity where tectonic forces fractured existing rock, allowing silica-rich and iron-calcium-aluminum-rich fluids to circulate, fill the voids, and alter the host rock, creating a cemented breccia over geological timescales.
Uses & applications
Used primarily as decorative landscape boulders, garden stones, and for lapidary work including cabochons and ornamental carvings.
Geological facts
Breccias tell a violent geological story, representing ancient fault zones or impact sites where rocks were shattered and subsequently healed by mineral-rich groundwater.
Field identification & locations
Can be identified in the field by its distinct angular, multicolored clasts (often red or brown jasper) bound together by a contrasting green mineral matrix like epidote. Found in regions with significant ancient tectonic and hydrothermal activity.
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