metamorphic
Pyrite-bearing Schist
Metamorphic rock with FeS2
AI-generated identification · may be incorrectHardness 6-6.5 for pyrite, 3-4 for schist matrix. Color is brassy yellow and gray. Luster is metallic to pearly. Crystal structure is isometric for pyrite grains within a foliated schist matrix.
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Physical properties
Hardness 6-6.5 for pyrite, 3-4 for schist matrix. Color is brassy yellow and gray. Luster is metallic to pearly. Crystal structure is isometric for pyrite grains within a foliated schist matrix.
Formation & geological history
Formed through regional metamorphism of pre-existing clay-rich or pelitic sedimentary rocks, with hydrothermal introduction of iron sulfide.
Uses & applications
Used primarily as a decorative or educational geological specimen by collectors.
Geological facts
Known as fool's gold due to its bright metallic yellow sheen mimicking real gold. Often forms in thin foliated layers.
Field identification & locations
Identified in the field by its distinct foliation, sparkling micaceous background, and brassy, cubic or granular metallic flecks. Found worldwide in metamorphic terranes.
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