Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Igneous Or Metamorphic
Browse igneous or metamorphic specimens identified by the Rock Identifier community.
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Epidosite
Epidosite (consisting primarily of Epidote Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz SiO2)
metamorphic
Red Garnet (Pyrope or Almandine)
Magnesium aluminum silicate (Mg3Al2(SiO4)3) or Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Garnet
Garnet group (X3Y2(SiO4)3)
mineral
Greenschist
Chlorite schist
metamorphic
Amphibolite with Hornblende
Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Gneiss (Metamorphic Rock)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Gneiss (Metamorphic Cobble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Gneiss
Gneiss (High-Grade Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Garnet
Garnet Group (e.g., Almandine, Pyrope)
mineral
Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)
Quartz–feldspar–mica rock; exact identification requires testing
metamorphic
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Greenstone
Metabasalt / Metamorphosed Igneous Rock
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Epidosite (Epidote-rich rock)
Epidotalite (primarily Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Pink-and-gray quartz-rich pegmatite, possibly rose quartz with feldspar
Quartz (SiO₂) with K-feldspar/plagioclase; likely pegmatitic granite
igneous
Greenschist (Greenstone)
Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)
metamorphic
Greenstone Pebble
Metabasalt / Greenstone
metamorphic
Greenschist
Chlorite schist
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic silicate rock)
metamorphic
Banded gneiss pebble
Gneiss, commonly quartz–feldspar–mica gneiss
metamorphic
Garnet
Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)
mineral
Ruby
Corundum (Al2O3:Cr)
gemstone
Sapphire
Corundum (Al2O3)
gemstone
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Greenstone
Chlorite schist / Meta-basalt
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Greenschist
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Rounded basalt cobble (probable)
Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene
igneous
Granite or granitic gneiss pebble
Felsic granitoid, chiefly quartz, feldspar, and mica; exact identification is uncertain from the photograph
igneous
Giallo Ornamental Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Tumbled pale quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral