mineral
Agate
SiO2
Mohs hardness 6.5-7, multicolored with banding, vitreous luster, cryptocrystalline structure, no cleavage
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Physical properties
Mohs hardness 6.5-7, multicolored with banding, vitreous luster, cryptocrystalline structure, no cleavage
Formation & geological history
Forms in volcanic rocks or ancient lavas as cavity fillings
Uses & applications
Used in jewelry making, ornamental objects, and holistic healing
Geological facts
Agate was named by Theophrastus, a Greek philosopher and naturalist.
Field identification & locations
Identify by its waxy luster, hardness, and banded or mottled appearance. Common worldwide.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous