Quartzite
Quartzite (SiO2)
metamorphic
Category
Synthetic (Not A Natural Rock)
Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
sedimentary
Quartzite (or Milky Quartz pebble)
Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)
metamorphic
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
metamorphic
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
sedimentary
Lapis Lazuli
Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Lapis Lazuli
Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Quartzite
Meta-quartzite (SiO2)
metamorphic
Quartzite (specifically a river-worn cobble)
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Lapis Lazuli
Na6Ca2(Al6Si6O24)(SO4,S,Cl,OH)2 (Lazurite-dominated rock)
metamorphic
Pink Sapphire
Corundum (Al2O3) with Chromium/Iron/Titanium trace impurities
mineral
Granite
Phaneritic Granitoid (Primary minerals: Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2 with iron impurities)
mineral
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite
Mineral (variety of Chalcedony)
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Amethyst (Quartz)
Amethyst (Silicon Dioxide with Iron impurities), SiO2
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Amethyst Quartz Druse
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Rough Garnet in Matrix
Almandine Garnet (Fe3Al2Si3O12)
mineral
Blue Tiger's Eye (Hawk's Eye)
Silicified Crocidolite (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Raw Emerald
Beryl (Be3Al2(SiO3)6) with Cr/V impurities
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pumice
Pumice (Highly vesicular volcanic glass)
igneous
Carnelian
Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)
Mineral
Herkimer Diamond in Matrix
Quartz (SiO2) in Dolostone (CaMg(CO3)2)
sedimentary (host) / mineral (crystals)
Ammonite Fossil (Polished Half)
Ammonoidea (subclass)
sedimentary
Amethyst (Tumbled/Water-worn)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite (Pink/Potassium-rich)
Phaneritic Plutonic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)
igneous
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic