Amethyst
Amethyst (Silicon Dioxide, SiO2)
Category
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Citrine
Citrine (Silicon Dioxide - SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Basalt with Epidote (Greenstone)
Amygdaloidal Basalt (Ca2(Al, Fe)3(SiO4)3(OH) inclusions)
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
Smoky Quartz
Quartz (SiO₂)
Quartz (Iron-stained or Ferruginous)
Silicon Dioxide (SiO2)
Schist
Mica Schist (Composition typically involves Muscovite, Biotite, Quartz, and Feldspar)
Granite
Granite (a felsic intrusive igneous rock)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
Limonite-stained Quartz / Quartzite
Silicon Dioxide (SiO2) with iron hydroxides (FeO(OH)·nH2O)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
Moonstone
Orthoclase Feldspar (formula: (K,Na)AlSi3O8)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (mica)
Moonstone
Orthoclase (Potassium aluminum silicate - KAlSi3O8)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
Peacock Ore
Bornite (Cu5FeS4)
Unakite
Epidotized Granite
Quartz (Milky to Clear)
Silicon Dioxide (SiO2)
Quartz (possibly Citrine or Smoky Quartz variety)
Silicon Dioxide (SiO2)
Aventurine (likely Green Aventurine)
Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)
Granite
Granite (a felsic intrusive igneous rock)
Quartz on Schist
Silicon Dioxide (SiO2) on Foliated Metamorphic Rock
Rock Crystal Quartz
Quartz (SiO₂)
Glaucophane-bearing Schist (Blueschist)
Blueschist (Glaucophane-Lawsonite Schist)
Corundum (Sapphire/Ruby in Matrix)
Corundum (Al2O3)
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
Orthoclase Feldspar (Twinning Specimen)
Orthoclase (KAlSi3O8)
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Talc (Soapstone variety)
Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
Muscovite (Mica)
Muscovite - KAl2(AlSi3O10)(OH)2