Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Primary Constituent)
Browse mineral (primary constituent) specimens identified by the Rock Identifier community.
Learn about Mineral (Primary Constituent) in the encyclopedia
View all →
Gravel / Crushed Stone
Aggregate (mixed mineral rock fragments)
sedimentary
Schist
Schist (metamorphic rock)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Red Jasper
Silicon Dioxide (SiO₂)
Sedimentary Rock (Cryptocrystalline Quartz)
Granite
Granitoid
igneous
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Biotite (Black Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite (Pink/Potassium Feldspar Granite)
Granite (plutonic rock, coarse-grained)
igneous
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Granite Cobble
Granite
igneous
Granite
Phaneritic plutonic rock (SiO2 + Al2O3 + K2O + Na2O + CaO)
igneous
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Epidote in Matrix (likely Amphibolite or Gneiss)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Likely fine-grained granite
Granite, composed mainly of quartz, feldspar, and mica
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Rounded river pebble, likely granite or granitic gneiss
Granite-dominated felsic silicate rock; typically quartz, feldspar, and mica
igneous
Quartz
SiO₂ (Silicon Dioxide)
Mineral
Lapis Lazuli
Lapis lazuli (Mainly Lazurite: Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral