Quartz (River Cobble)
Silicon Dioxide (SiO2)
Category
Browse mixed (sedimentary, igneous, and metamorphic) specimens identified by the Rock Identifier community.
Quartz (River Cobble)
Silicon Dioxide (SiO2)
Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
Smoky Quartz
SiO2 (Silicon Dioxide)
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
Pyrite (on Quartz/Sulfide matrix)
Iron Sulfide (FeS2)
Gneiss
Gneiss (High-grade metamorphic rock)
Milky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Green Quartz (Prasiolite or Aventurine)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
Citrine
Silicon Dioxide (SiO2)
Pyrite
Iron Pyrite (FeS2)
Hematite
Iron Oxide (Fe2O3)
Magnetite (Lodestone variant potential)
Magnetite (Fe3O4)
Schist
Metamorphic Rock (Schist)
Banded Gneiss
Gneiss (Metamorphic Rock)
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Green Quartz (Prasiolite variant or Aventurine)
Silicon Dioxide (SiO2)
Quartz Pebble with Jasper and Iron Inclusions
Silicon Dioxide (SiO2)
Epidote
Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Garnet in Matrix
Almandine or Pyrope Garnet (X3Y2(SiO4)3) in Schist or Eclogite matrix
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Green Quartz (Prasiolite)
Crystalline Silicon Dioxide (SiO2)
Black Tourmaline (Schorl)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH
Gold Ore
Native Gold (Au) in Quartz or Silicate matrix
Amethyst and Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2) with trace impurities iron (Amethyst) and aluminum/radiation (Smoky Quartz)
Gneiss
Gneiss (High-grade metamorphic rock)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Yellow/Orange variety)
Silicon Dioxide (SiO2)
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Tumbled)
Silicon Dioxide (SiO2)
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)