Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic (Localized) Or Sedimentary
Browse metamorphic (localized) or sedimentary specimens identified by the Rock Identifier community.
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Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Gray/Smoky Varieties)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Marble
Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)
metamorphic
Phyllite
Phyllite (Foliated metamorphic rock)
metamorphic
Banded gneiss pebble
Gneiss, commonly quartz–feldspar–mica gneiss
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
River Cobble (Quartzite / Sandstone Gravel)
SiO2 (Quartz-rich sedimentary/metamorphic rock)
sedimentary
River Pebble (Quartzite / Sandstone)
SiO2 (Quartz-rich sedimentary/metamorphic rock)
sedimentary
Beach Pebble (Quartzite / Sandstone)
Quartz-rich sedimentary or metamorphic rock pebble
sedimentary
Anthracite Coal
Anthracite (Carbon-rich metamorphic sedimentary rock)
sedimentary
Quartz vein fragment
Milky quartz (SiO₂), possibly with weathered host rock
metamorphic
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Slate
Metamorphic Mudstone / Shale
metamorphic
Garnet-bearing schist
Mica schist with garnet porphyroblasts; garnet likely almandine, Fe₃Al₂(SiO₄)₃
metamorphic
Greenstone / Greenschist
Greenschist facies metamorphic rock
metamorphic
Muscovite Mica Schist
Metamorphic Rock (Muscovite-Biotite Schist)
metamorphic
Banded gneiss or gneissic schist
Quartz–feldspar–mica gneiss; exact mineral proportions require testing
metamorphic
Biotite Schist
Metamorphic Rock (Schist)
metamorphic
Banded Gneiss Pebble
Gneiss (Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Ruby Zoisite
Anyolite (Calcium aluminium silicate with Chromium/Corundum inclusions)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Weathered iron-rich rock, likely shale or slate
Probably ferruginous shale (iron-oxide-stained mudstone); exact identification requires testing
sedimentary
Weathered wood-like rock surface, likely slate or schist
Probable graphitic schist or slate; exact identification is uncertain from the image
metamorphic
Dark metamorphic rock, likely schist or phyllite
Quartz–mica schist/phyllite; chiefly quartz, mica, and feldspar
metamorphic
Mica schist
Mica-rich schist, likely muscovite–quartz schist
metamorphic
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly milky quartz or chalcedony
mineral
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
metamorphic
Banded gneiss (likely amphibolite-bearing gneiss)
Gneiss; quartz–feldspar–mica/amphibole aggregate
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with fuchsite inclusions)
Mineral
River Pebble (Gneiss or Quartzite mixture)
Metamorphic rock (Commonly Gneissic)
metamorphic
Quartz-rich gneiss
Foliated quartz–feldspar–mica gneiss, possibly migmatitic
metamorphic
Weathered jasper or iron-stained quartzite
Silicified quartz-rich rock, primarily microcrystalline quartz (SiO₂) with iron-oxide/hydroxide staining
metamorphic
Likely pyrite-bearing rock
Pyrite (FeS₂), possibly in a quartz- or iron-oxide-rich matrix
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Gneiss with Quartz Vein
Metamorphic Gneiss with Quartz (SiO2) and Feldspar Injection
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic