Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Category
Igneous (Anthropogenic)
Browse igneous (anthropogenic) specimens identified by the Rock Identifier community.
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Lemon Quartz (Orizaba/Citrinated Quartz)
Silicon Dioxide (SiO2) with iron impurities/treatment
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Unakite
Unakite (Epidotized Granite)
metamorphic
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodalite)
mineral
Mixed Mineral Specimens
Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)
mineral
Mica (specimen appears to be Muscovite or Phlogopite)
Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2
Mineral (Found in Igneous and Metamorphic rocks)
Quartz (Common or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Lace Agate
Cryptocrystalline Quartz (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Moonstone
Orthoclase (Potassium aluminum silicate - KAlSi3O8)
mineral
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Moonstone
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Yellow Quartz (Citrine Quartzite)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Gold Nugget
Native Gold (Au)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Garnet and Quartz
Pyrope or Almandine (Red Garnets) and Quartz (Center Stone)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Disulfide (FeS2)
mineral
Quartz (Milky/Crystalline)
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Chalcedony (Smoky Quartz or Agate nodule fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal (specifically Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral