Quartzite
Quartzite (SiO2)
metamorphic
Community gallery
All rocks & minerals
Every specimen the Rock Identifier community has discovered, from desert agates to deep-sea basalts.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Pyrite in Quartz
Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
metamorphic
Chert (variety Gray or Dark Chert)
Silicon Dioxide (SiO2)
sedimentary
Vesicular Basalt / Scoria
Vesicular Basalt
igneous
Basalt
Basalt (Extrusive Igneous Rock)
igneous
Chert (Chert Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (with Iron Staining)
Chert (SiO2)
sedimentary
Chert (Jasper influence)
Microcrystalline Quartz (SiO2)
sedimentary
Mica Schist
Mica Schist (Quartz-Biotite-Muscovite Schist)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar rock)
igneous
Gneiss
Gneiss (quartz-feldspar-biotite gneiss)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Granite Gneiss or Granitoid River Rock
Granitoid / Gneiss
Metamorphic or Igneous
Granite Gneiss River Rock
Gneiss
Metamorphic
Andesite Porphyry
Andesite Porphyry
Igneous
Scoria
Scoria
Igneous
Brecciated Jasper or Chert
SiO2
Sedimentary/Metamorphic
Brecciated stone pebble
Breccia
sedimentary
Brecciated Limestone or Marble Pebble
Breccia / Calcite (CaCO3)
Sedimentary / Metamorphic
Picasso Stone
Metamorphic Limestone (Marble)
metamorphic
Granite
Granite
Igneous
Quartzite
Quartzite
Metamorphic
Jasper
Silicon dioxide (SiO2)
Sedimentary / Mineral
Jasper
Silicon dioxide, SiO2
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Granite
Granite
Igneous
Basalt
Basalt
igneous
Granite
Granite
Igneous
Hag Stone
Flint / Chert / Limestone concretion with a natural hole
sedimentary
Quartzite with inclusions or weathered surface
Quartzite
metamorphic
Granite or Porphyritic Igneous Rock (weathered)
Granitoid
Igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
mineral
Quartzite with inclusions or a banded chert
Quartzite or Chert
Metamorphic or Sedimentary