Weathered quartz-rich pebble, possibly granitic gneiss
Quartz–feldspar–mica aggregate; likely granitoid or gneiss
metamorphic
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
Learn about Mineral (Silicate Variety) in the encyclopedia
View all →
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Granite
Intrusive igneous rock
igneous
Pallasite Meteorite (likely Imilac or Brenham)
Stony-Iron Meteorite (Pallasite)
mineral
Common Opal
Hydrated silica (SiO2 " nH2O)
mineral
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Iron Slag
Ferrous Slag (Silicate/Oxide mixture)
industrial byproduct (anthropogenic)
Cream Marble (Speckled)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Diorite (Spotted)
Diorite (Intrusive igneous rock)
igneous
Granite
Intrusive Igneous Rock
igneous
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Mineral
Weathered gray stone, possibly basalt or granitic rock
Indeterminate fine- to medium-grained silicate rock; possible basalt, diabase, or weathered granite
igneous
Serpentinite
Serpentinite (Hydrated magnesium iron silicate)
metamorphic
Olivine (Peridot in gem form)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Rose Quartz and Pegmatite
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Kyanite
Kyanite (Al2SiO5)
mineral
Greenstone (Rough Jadeite or Nephrite)
Sodium aluminum silicate (Jadeite) / Calcium magnesium iron silicate (Nephrite)
metamorphic
Diorite
Intermediate plutonic igneous rock
Igneous
Red Ochre (Hematite-rich Clay)
Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)
Sedimentary
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
sedimentary
Glauconitic Sandstone
Glauconitic Quartz Arenite
sedimentary
Kaolinite Claystone
Al2Si2O5(OH)4 (Kaolinite)
sedimentary
Crushed Granite and Quartz Gravel
Composite Igneous and Silicate Rock Aggregate
igneous
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
mineral
Quartz with Tourmaline or Amphibole
Silicon Dioxide with silicate inclusions (SiO2)
mineral
Amazonite with Quartz and Smoky Quartz
Potassium Aluminum Silicate (KAlSi3O8) with SiO2
mineral
Moonstone
Adularia (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8Al6Si6O24Cl2)
mineral
Micro-Meteorite (Micrometeoroid)
Extraterrestrial Spherule (Silicate or Iron-Nickel)
mineral
Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Olivine in Quartz/Feldspar Matrix (Peridotite or Granitic Pegmatite)
(Mg,Fe)2SiO4 (Olivine) with Quartz / Feldspar
igneous
Schist
Mica Schist (Complex Silicates)
metamorphic
Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Quartz-veined Granite or Gneiss Pebble
Silicate-rich metamorphic rock fragment
metamorphic
Likely weathered igneous rock fragments
Indeterminate; possibly basaltic or granitic rock with quartz, feldspar, and dark mafic minerals
igneous
Green Jasper (Chert)
Microcrystalline Quartz (SiO2) with iron/clay inclusion
sedimentary
Granite
Intrusive Igneous Rock
igneous