mineral
Painted Rock / Geode Specimen
Silicon Dioxide with artificial pigment coating
Hardness varies from 3 to 7 depending on matrix vs crystal, color shows patches of bright artificial blue and orange paint over a gray earthy matrix, luster is dull to vitreous, crystal structure is cryptocrystalline to trigonal where exposed.
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Physical properties
Hardness varies from 3 to 7 depending on matrix vs crystal, color shows patches of bright artificial blue and orange paint over a gray earthy matrix, luster is dull to vitreous, crystal structure is cryptocrystalline to trigonal where exposed.
Formation & geological history
Natural mineral formation subsequently altered by human intervention (painted).
Uses & applications
Decorative object, crafts, or novelty collection.
Geological facts
Many naturally occurring rocks and geodes are painted by hobbyists or tourists, which can sometimes obscure the natural mineral identification until cleaned.
Field identification & locations
Identify by observing unusual, vibrant artificial pigments applied to the outer surface of a weathered rock or geode fragment.
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