Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Category
Metamorphic (Low Grade)
Browse metamorphic (low grade) specimens identified by the Rock Identifier community.
Petrified Wood
Silicified Wood (SiO2 - primarily Quartz/Chalcedony/Opal)
Mineral/Fossil (Sedimentary context)
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine/Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Green Aventurine
Aventurine Quartz (SiO2 + Muscovite/Fuchsite)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2 with Fuchsite inclusions)
metamorphic
Raw Emerald
Beryl (Be3Al2(SiO3)6) with Cr/V impurities
mineral
Tiger's Eye
SiO2 (Pseudomorph of Quartz after Crocidolite)
metamorphic
Raw Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
mineral
Anthracite
Anthracite Coal
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sapphire
Corundum (Al2O3)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O
mineral
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Mineral
Anthracite Coal
Anthracite
metamorphic
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Tiger's Iron
Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)
metamorphic
Ruby in Fuchsite
Corundum (Al2O3) in Chrome-Mica (KAl2(AlSi3O10)(OH)2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rough Emerald/Green Beryl
Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Mineral
Topaz
Topaz (Al2SiO4(F,OH)2)
Mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeO(OH)) inclusions
mineral
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Iron Ore / Ironstone Concretion
Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.
Mineral, specifically an iron ore
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Chert (Yellow Jasper/Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
mineral
Nephrite Jade (River Cobble)
Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Diamond
Diamond (pure carbon C)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral