Chalcedony (Agate/Quartz variety)
Cryptocrystalline Quartz (SiO2)
Category
Browse sedimentary or igneous specimens identified by the Rock Identifier community.
Chalcedony (Agate/Quartz variety)
Cryptocrystalline Quartz (SiO2)
Potassium Feldspar (Orthoclase)
KAlSi3O8
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Milky Variant)
Quartz (Silicon Dioxide, SiO2)
Chalcedony (Yellow Agate)
Cryptocrystalline Quartz (SiO2)
Orange Calcite point
Calcite (Calcium Carbonate, CaCO3)
Gneiss (specifically Banded Gneiss)
Gneiss
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Smoky or Clear variety with inclusions)
Silicon Dioxide (SiO2)
Chalcedony (specifically Agate or Moonstone-like Quartz)
Silicon Dioxide (SiO2)
Garnet
Almandine (Fe3Al2(SiO4)3)
Blue Calcite
Calcium Carbonate (CaCO3)
Quartz (Druzy)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Banded Gneiss
Gneiss
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Carnelian (Carnelian Agate)
Carnelian (Silicon Dioxide - SiO2)
Quartz (Milky or Grainy Variety)
Silicon Dioxide (SiO2)
Quartz (Milky or Clear variety)
Silicon Dioxide (SiO2)
Magnetite / Iron Ore
Magnetite (Fe3O4)
Agate (Nodule/Chert)
Silicon Dioxide (SiO2)
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Calcite
Calcium Carbonate (CaCO3)
Almandine Garnet
Almandine [Fe3Al2(SiO4)3]
Hematite
Iron(III) oxide (Fe2O3)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Chalcedony
Chalcedony (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Gneiss
High-grade Metamorphic Gneiss
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
Gneiss
Gneiss