Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Almandine Garnet (weathered)
Almandine (Fe3Al2(SiO4)3)
mineral
Agate
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Herkimer Diamond variant)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz Cluster
Quartz (Silicon Dioxide) - SiO2
mineral
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)
Mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz Vein Rock
Silicon Dioxide (SiO2)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Rose Quartz
Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)
mineral
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Mineral
Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Bi-Color Tourmaline (or Watermelon Tourmaline)
Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)
Mineral
Kyanite (Green and Blue varieties)
Kyanite (Al2SiO5)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Banded Agate (Yellow Agate)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
mineral
Garnet (likely Almandine, Pyrope, or a blend)
Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)
Mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Gneiss
Gneiss
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic Volcanic Rock (primarily Plagioclase and Pyroxene)
Igneous
Biotite Mica
K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
Mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)
Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)
igneous or sedimentary
White Agate (Chalcedony)
Chalcedony (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Agate
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral