mineral
Agate
SiO2
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale, waxy luster, microcrystalline quartz, no cleavage, conchoidal fracture. Displays banding and various colors due to impurities.
Identified More mineral →
Explore Agate in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 6.5-7 on Mohs scale, waxy luster, microcrystalline quartz, no cleavage, conchoidal fracture. Displays banding and various colors due to impurities.
Formation & geological history
Forms in cavities of eruptive rocks or ancient lavas where silica-rich groundwater deposits microcrystalline quartz in concentric layers over long periods.
Uses & applications
Commonly used in jewelry, ornamental objects, carving, and as a collector's specimen.
Geological facts
Agate is a variety of chalcedony. The colorful bands and patterns are caused by traces of oxides of iron, manganese, titanium, chromium, nickel, and other elements.
Field identification & locations
Identified by its waxy luster, hardness (can scratch glass), and characteristic banding or moss-like inclusions. Widely found globally in volcanic regions.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral
Mineral Sand (Heavy Mineral Sand Concentrate)
Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite
mineral
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Granite
Granite (Phaneritic intrusive igneous rock)
igneous