Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Mineral In Igneous Rock
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Granite
Felsic Plutonic Rock (Granite)
igneous
Granite Pebble
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Hornblende)
igneous
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Granite
Granite (Silicic Plutonic Rock)
igneous
Granite
Granite
igneous
Porphyritic Basalt
Porphyritic Basalt (with Plagioclase and Augite phenocrysts)
igneous
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Schorl (Black Tourmaline) in Quartz or Feldspar Matrix
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl) in Granitic Pegmatite
igneous
Basalt
Mafic volcanic rock (formula varies by mineral content: Ca-plagioclase, Pyroxene, Olivine)
igneous
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Gold Ore
Auriferous Quartz and Sulfide Mineralization in Host Rock
igneous
Pink Granite with Quartz Vein
Phaneritic Plutonic Felsic Rock (K-feldspar + Quartz + Plagioclase + Mica)
igneous
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Gold Ore in Matrix
Native Gold (Au) in Quartz/Host Rock
mineral
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Metamorphic Rock
Basalt
Basalt (composition of plagioclase, pyroxene, and olivine)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Calcite Vein Rock
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Greenschist (Greenstone)
Chlorite Schist / Greenschist Facies Rock
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene
igneous
Granite
Felsic Plutonic Rock (primarily SiO2)
igneous
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Phaneritic plutonic rock (Quartz + Feldspar + Mica)
igneous
Granite (Background) and Quartzite/River Pebble (Foreground Heart)
Phaneritic Felsic Igneous Rock (Granite background)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphism)
metamorphic
Granite Cobble (River Stone)
Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)
igneous
Granite
Plutonic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)
igneous
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Vesicular Basalt (Scoria)
Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)
Igneous
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral