Red Quartzite
Metamorphosed Quartz Sandstone (SiO2 with Iron Oxide impurities)
Category
Browse metamorphic and sedimentary specimens identified by the Rock Identifier community.
Red Quartzite
Metamorphosed Quartz Sandstone (SiO2 with Iron Oxide impurities)
Garnet Rhyolite
Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet
Slate
Slate (Foliated metamorphic rock consisting mainly of quartz and muscovite or illite)
Stiped Slate Beach Pebble
Low-grade Metamorphic Slate with Quartz Vein (SiO2 on Phyllosilicate base)
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)
Quartzite (specifically Pink or Red Quartzite)
Metamorphosed Quartz Sandstone (SiO2)
Greenstone / Greenstone Pebble
Greenschist (metamorphosed basalt or gabbro)
Quartzite
Quartzite (SiO2)
Quartzite Cobble
Metamorphosed Quartz Sandstone (primarily SiO2)
Quartzite
Quartzite
Green Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Quartzite
Quartzite (primarily SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Quartzite
Quartzite (SiO2)
Quartzite Pebble
Quartzite (primarily SiO2)
Cloudy Quartz with Mica inclusions
Silicon Dioxide (SiO2) with accessory Muscovite KAl2(AlSi3O10)(OH)2
White Jade (Nephrite)
Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
Blue Quartzite
Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite), SiO2
White Marble
Recrystallized Calcite (CaCO3)
Green Aventurine (Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)
Schist
Schist (various mineral compositions)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Shale
Shale (Consolidated fine-grained clay/silt)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (SiO2 dominant)
Shale
Lutaceous sedimentary rock
Epidote in Granite Gneiss
Epidote bearing Orthogneiss (Ca2(Al,Fe)3(SiO4)3(OH))
Quartzite
Quartzite (SiO2)
Garnet
Almandine (Fe3Al2(SiO4)3)
Chiastolite (Andalusite)
Al2SiO5
Jasper containing epidote (Unakite-like)
Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
Quartzite
Quartzite (SiO2)
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
Quartzite
Quartzite (primarily SiO2)
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Epidote in Quartz
Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Milky Quartz (SiO2)
Lapis Lazuli
Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite
Zebra Jasper (usually a trade name for Serpentine or Basalt blend)
Antigorite/Chrysotile (Serpentine family) - Mg3Si2O5(OH)4
Lapis Lazuli
Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
Jasper (with orbicular/unakitoid tendencies)
Silicon Dioxide (SiO2) with iron and epidote inclusions
Almandine Garnet & Tumbled Citrine Quartz
Fe3Al2(SiO4)3 (Garnet) and SiO2 (Quartz)