mineral

Agate

SiO2 (Silicon Dioxide)

Hardness 6.5-7 on Mohs scale. Varies in color, often banded or translucent. Waxy luster. Microcrystalline structure.

Identified August 25, 2026More mineral →

Get a report just like this from any photo, free.

Physical properties

Hardness 6.5-7 on Mohs scale. Varies in color, often banded or translucent. Waxy luster. Microcrystalline structure.

Forms in nodules in volcanic rocks or ancient lavas, in former gas cavities produced by volatiles in the original molten mass.

Used in jewelry, ornaments, and as a collector's stone. Also has industrial uses for precision tools.

Agates are named after the Achates River (now Dirillo) in Sicily, where they were first found.

Found worldwide, notable locations include Brazil, Uruguay, and the USA (e.g., Lake Superior). Identified by its banding and translucency.

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

Septarian Pebble

Septarian nodule / Concretion

Granite

Granite (Phaneritic intrusive igneous rock)