Green Aventurine
Silicon dioxide (SiO2) with fuchsite inclusions
mineral
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
Granite Pegmatite
Coarse-grained Granite (SiO2 - Aluminum and Alkalies)
igneous
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
metamorphic
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Garnet Schist
Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)
metamorphic
Nuummite
Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)
metamorphic
Greenstone (Epidote/Chlorite-rich Metabasalt)
Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)
metamorphic
Prehnite with Epidote inclusions
Prehnite: Ca2Al(AlSi3O10)(OH)2; Epidote: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
metamorphic
Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Mineral
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
metamorphic
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Agate (Polished Slice)
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Granite
Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Mineral
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
Quartzite with Quartz Geode / Vug
Crystalline Silicon Dioxide (SiO2) in Metamorphic Host
metamorphic