Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz Drusy (on Geode Fragment)
Crystalline Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss
metamorphic
Labradorite
(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Grey Chalcedony (Tumbled)
Chalcedony (SiO2)
mineral
Gneiss
High-grade foliated metamorphic rock
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
River Rock (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneiss)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Greenstone
Metabasalt / Greenstone
metamorphic
Pyrite
Iron Disulfide (FeS2)
Mineral
Botryoidal Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Epidosite (Unakite-related)
Epidosite (predominantly Epidote, Ca2(Al2,Fe3+)(SiO4)3(OH))
metamorphic
Gneiss
Gneiss
metamorphic
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
River Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Greenstone
Greenschist / Greenstone (Chlorite-Epidote facies)
metamorphic
Polished/tumbled metallic sulfide specimen, likely pyrite
Pyrite (FeS₂), possibly mixed with chalcopyrite or other sulfides
mineral
Basalt with Epidote (Flowerstone-like texture)
Amygdaloidal Basalt (silicate mineral inclusions)
igneous
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
sedimentary
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Granite
Crystalline Silicon Dioxide (SiO2) in Granitic Matrix
mineral/igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Granitic Gneiss
Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)
metamorphic