Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Or Sedimentary Depending On Local Grade
Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.
Learn about Metamorphic Or Sedimentary Depending On Local Grade in the encyclopedia
View all →
Diamond (in jewelry setting)
Diamond (Carbon, C)
mineral
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Unakite
Epidote-Feldspar rock (specifically, a variety of granite)
Metamorphic rock
Sunstone
Aventurine Feldspar (Plagioclase Feldspar with inclusions)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Iron Formation
Banded Iron Formation (BIF)
Sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Corundum (Pink Sapphire / Ruby)
Al2O3 (Aluminum Oxide)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
mineral
Conglomerate
Conglomerate / Lithic Wacke
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Limonite (Ironstone Concretion)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Ruby
Corundum (Al2O3)
mineral
Siltstone
Siltstone (primarily SiO2 with Fe2O3)
sedimentary
Banded Iron Formation (BIF) / Jasper
Banded Iron Formation (primarily Quartz/SiO2 and Hematite/Fe2O3)
sedimentary
Banded Iron Formation (Jasper-Hematite)
Banded Iron Formation (BIF); composition primarily Hematite (Fe2O3) and Chalcedony/Quartz (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Fossilized Megalodon Tooth Fragment
Otodus megalodon (Carcharocles megalodon fossil)
sedimentary
Botryoidal Chalcedony
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Silver (Native Element)
Ag (Argentum)
mineral
Anthracite Coal
Anthracite (Carbon-rich mineraloid)
metamorphic
Anthracite Coal
Anthracite
metamorphic
Green Schist
Greenschist (composed of Chlorite, Actinolite, and Epidote)
metamorphic
Fossilized Gastropod in Chert/Limestone
Internal mold of Gastropoda (Class) with CaCO3 or SiO2 mineral formula
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Banded Iron Formation (BIF) / Jasper
Magnetite / Hematite-bearing Chert / Jasper
sedimentary
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
Sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Garnet in Matrix
Almandine Garnet (Fe3Al2(SiO4)3)
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
mineral
Black Tourmaline (Schorl)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH
mineral
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 predominant)
sedimentary
Limonite (Ironstone Concretion)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral