Milky Quartz (Common Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Specifically A Rock Composed Of Minerals) in the encyclopedia
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Asphalt Pavement (with aggregate)
Asphalt concrete
man-made composite
Schist
Schist (metamorphic rock)
metamorphic
Granite / Diorite (Granitoid)
Granitoid rock (composed mainly of Quartz, Feldspar, and Amphibole/Biotite)
igneous
Foliated Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone
Arenite (mostly Quartz-based)
sedimentary
Quartzite Cobble
Quartzite (composed primarily of SiO2)
metamorphic
Granite Pebble
Intrusive Igneous Rock
igneous
Basalt with Amygdaloidal Inclusions
Aphanitic Mafic Volcanic Rock (Basalt)
igneous
River Cobble (Basaltic/Andesitic)
Mafic Igneous Porphyritic Rock
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Blue Sapphire
Corundum (Al2O3 with iron and titanium trace elements)
mineral
Agate Geode Slice with Druzy Quartz
Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz
mineral
Vesicular Basalt with Quartz/Chalcedony
Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)
igneous
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Granite
Granite
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Giallo Ornamental Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Granite (Weathered)
Phaneritic Felsic Igneous Rock
Igneous
Montana Moss Agate
Chalcedony (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Red Scoria (Volcanic Cinder)
Scoria (Extrusive Mafic Igneous Rock)
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Chert (White-Tan variety)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Pink Granite
Phaneritic Plutonic Igneous Rock (composed of K-feldspar, Quartz, and Mica)
igneous
Argillite / Mudstone
Argillaceous sedimentary rock
sedimentary
Schist
Mica Schist (Metamorphic rock)
metamorphic
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Slate
Slate (Metamorphic Rock)
metamorphic
Rounded quartz-rich pebble
Likely granitoid-derived quartz–feldspar rock; exact identification uncertain from image
igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Likely dark green-gray metamorphic pebble
Indeterminate; possibly chlorite schist, serpentinite, or amphibolite
metamorphic
Gray slate
Slate; fine-grained foliated metamorphic rock composed mainly of mica and quartz
metamorphic