igneous
Dragonstone (Brecciated Basalt/Diabase with Epidote and Quartz)
Brecciated mafic igneous rock
Hardness typically 6-7 on the Mohs scale depending on quartz content. Colors feature dark green to black fragments (basalt/diabase) set in a contrasting matrix of pinkish feldspar, epidote, and white quartz veins. Luster ranges from dull to vitreous where quartz is present.…
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Physical properties
Hardness typically 6-7 on the Mohs scale depending on quartz content. Colors feature dark green to black fragments (basalt/diabase) set in a contrasting matrix of pinkish feldspar, epidote, and white quartz veins. Luster ranges from dull to vitreous where quartz is present. Crystalline structure is microcrystalline to phaneritic within veins.
Formation & geological history
Formed via tectonic fracturing of basaltic or diabase parent rock, followed by hydrothermal fluid circulation that deposited secondary minerals like epidote, quartz, and feldspar into the fracture network (breccia cementation).
Uses & applications
Commonly used for ornamental carvings, tumbled stones, lapidary arts, and specimen collecting.
Geological facts
The striking pattern of dark green angular segments bound by lighter pink and white mineral veins gives it a distinctive 'dragon scale' appearance, making it a favorite among crystal collectors.
Field identification & locations
Easily identified by its distinct brecciated texture showing dark green blocks cemented by pinkish-white mineral veins. Often sourced from South Africa.
