Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Category
Synthetic Material (Not A Rock Or Mineral)
Browse synthetic material (not a rock or mineral) specimens identified by the Rock Identifier community.
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Sandstone (Quartzose)
Sandstone (clastic sedimentary rock, primarily SiO2)
sedimentary
Quartz Vein on Matrix
Silicon Dioxide (SiO2)
mineral
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3/FeO(OH))
mineral
Gneiss
Gneissic Metamorphic Rock
metamorphic
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz (River Pebble)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Herkimer Diamond in Matrix
Quartz (SiO2) in Dolostone (CaMg(CO3)2)
sedimentary (host) / mineral (crystals)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide - SiO2)
mineral
Almandine Garnet in Matrix
Almandine (Fe3Al2(SiO4)3)
metamorphic
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Dyed Agate Geode (Pink/Magenta)
Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz
mineral
Milky Quartz with Chlorite/Mica inclusions
Silicon Dioxide (SiO2) with inclusions
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Carnelian Agate (with Quartz/Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace titanium, iron, or manganese
mineral
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Sandstone (Gneissic or Banded)
Clastic Sedimentary Rock (composed predominantly of SiO2)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Amber
Succinite
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rough Aquamarine
Beryl (Be₃Al₂Si₆O‑₁•H₂O)
Mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz/Plagioclase Inclusions
Mafic volcanic rock (Basaltic)
igneous
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Mineral/Fossil
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
metamorphic
Chrysocolla
Hydrated copper silicates (Cu, Al)2H2Si2O5(OH)4·nH2O
mineral
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral