Granitoid (Common Granite/Gneiss)
Granitoid (primarily Quartz [SiO2], Feldspar [KAlSi3O8], and Mica)
Category
Browse carved stone specimens identified by the Rock Identifier community.
Granitoid (Common Granite/Gneiss)
Granitoid (primarily Quartz [SiO2], Feldspar [KAlSi3O8], and Mica)
Quartzite with Chlorite and Iron Staining
Quartzite (SiO2) with Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2
Granite Cobble
Granite (composed primarily of quartz, feldspar, and mica)
Chert
Chert (Microcrystalline Quartz)
Unakite
Unakite (Epidotized Granite)
Gneiss
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)
Quartzite
Quartzite
Quartzite Pebbles
Quartzite (SiO2)
Epidote with Quartz/Feldspar
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock
Dalmatian Jasper
Peralkaline rhyolite with arfvedsonite inclusions
Basalt River Stone
Basalt
Limestone
Calcium Carbonate (CaCO3)
Quartzite pebble
Quartzite (Silicon Dioxide, SiO2)
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
Fossiliferous limestone
Bioclastic limestone, primarily calcite (CaCO₃)
Unakite
Epidotized Granite
Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)
Red Tuff / Sandstone
Rhyolitic Tuff / Pyroclastic Volcanic Rock
Likely gneiss
Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole
Quartzite
Quartzite (SiO2-rich metamorphic rock)
Quartzite
Metamorphic Quartzite (SiO2)
Greenstone
Metabasalt
Quartzite
Quartzite (predominantly SiO2)
Quartzite
Quartzite (primarily SiO2)
Greenstone
Greenschist
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Schist
Mica Schist (primarily Muscovite and Biotite)
Rhyolite
Rhyolite
Quartzite
Metamorphic Quartzite (SiO2)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Unakite (or Epidotized Granite)
Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)
Flint
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Green Jasper
Quartz (Silicon Dioxide, SiO2) with iron silicate inclusions
Chert
Microcrystalline Quartz (SiO2)
Greenstone Pebble
Metabasalt (often containing chlorite, actinolite, or epidote)
Hag Stone
Perforated sedimentary rock (typically limestone, sandstone, or flint)
Hag Stone
Natural Perforated Flint or Chert (SiO2)
Likely citrine pendant
Quartz, silicon dioxide (SiO₂), probably heat-treated amethyst or smoky quartz
River Stone (Basalt or fine-grained Schist)
Mafic Igneous Rock / Volcanic Basalt
Porphyritic Basalt
Porphyritic Aphanitic Basalt with Plagioclase Phenocrysts