Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.
Learn about Igneous, Sedimentary, Or Metamorphic (Mineral Based) in the encyclopedia
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Gneiss
Metamorphic Gneiss
metamorphic
Epidote (Unakite variety)
Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Gneiss (Augen Gneiss)
Augen Gneiss
metamorphic
Anthracite Coal
Anthracite (Carbon-based sedimentary-metamorphic rock)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Mica-rich Schist fragment
Mica Schist
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Gneiss
Gneiss (High-Grade Metamorphic Rock)
metamorphic
Gneiss (Metamorphosed Granitic Rock)
Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)
metamorphic
Schist
Mica Schist (Metamorphic rock)
metamorphic
Sandstone with Quarzite clasts
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Green Mica Schist
Mica Schist (Fuchsite or Chlorite variety)
metamorphic
Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Diamond Drill Core (Greenschist and Quartzite)
Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)
metamorphic
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Small clear crystal, probably quartz
Quartz (SiO₂), possibly a tiny quartz chip or translucent feldspar fragment
mineral
Granitic Gneiss
Gneiss (Metamorphic rock predominantly containing quartz, K-feldspar, and plagioclase)
metamorphic
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
mineral
Gneiss
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Mica / Muscovite or Biotite
Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)
mineral
River Stone (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) based metamorphosed sandstone
metamorphic or sedimentary
Dendritic sandstone
Sandstone with Manganese Oxide dendrites
sedimentary
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Gneiss
Granitic Gneiss
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary