Carnelian Agate
Carnelian (Silicon Dioxide - SiO2 with Iron Oxide impurities)
Mineral
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.
Learn about Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites) in the encyclopedia
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Amethyst (Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Greenstone Pebble
Metabasalt (often containing chlorite, actinolite, or epidote)
metamorphic
Greenstone / Nephrite Jade
Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Greenstone
Metabasalt (composed mainly of chlorite, epidote, and actinolite)
metamorphic
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Peacock Ore (Chalcopyrite)
Chalcopyrite (CuFeS2)
mineral
Amethyst (Rough)
Quartz, SiO2
mineral
Gneiss
Gneiss
metamorphic
Quartz-veined Diabase or Basalt Pebble
Diabase or Basalt with Hydrothermal Quartz Veins (SiO2)
igneous
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Coal
Bituminous Coal (organic sedimentary rock)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Granite
Granite (a felsic intrusive igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Raw Emerald
Beryl (Be3Al2(SiO3)6) with Cr/V impurities
mineral
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Quartz Boulder
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Rough Dark Green Sapphire
Corundum (Al2O3)
mineral
Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Smoky Quartz Cluster
Quartz (Silicon Dioxide) - SiO2
mineral
Quartzite (River Cobble)
Quartzite (SiO2)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Quartzite
SiO2 (Silicon Dioxide)
metamorphic
Citrine
Silicon dioxide (SiO2)
mineral
Granite
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Agate
Silicon Dioxide (SiO2)
mineral