Quartzite Cobble
Quartzite (principally SiO2)
metamorphic
Category
Manufactured Stone
Browse manufactured stone specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Amber
Fossilized Tree Resin (Successite)
fossil
Fluorite Geode
Calcium Fluoride (CaF2)
mineral
Quartz Geode with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a geode structure
mineral
Desert Rose (Gelenite)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Fluorite Tower
Calcium Fluoride (CaF2)
mineral
Rough Quartz
Silicon Dioxide (SiO2)
mineral
Calcite with Quartz coating
Calcium Carbonate (CaCO3) with Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal (specifically a milky or semi-translucent single crystal point)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Limestone (containing Fossil Mold)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Halite
Halite (Sodium Chloride, NaCl)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sulfur on Quartz
Native Sulfur (S8) with Quartz (SiO2)
mineral
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Fossiliferous Shale
Laminated Mudrock with plant fossils
sedimentary
Quartz (Druzy or Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Quartz (Yellow/Citrine variety)
Silicon Dioxide (SiO2)
mineral
Banded Iron Formation (BIF)
Banded Iron Formation (Magnetite-Hematite-Chert)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Limestone
CaCO3 (Mainly Calcite or Aragonite)
sedimentary
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Potassium Feldspar
K-Feldspar (KAlSi3O8)
mineral
Obsidian
Volcanic glass (high silica volcanic rock)
igneous
Quartz (Clear to Smokey)
Silicon Dioxide (SiO2)
mineral