Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Non Geological
Browse non geological specimens identified by the Rock Identifier community.
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Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Weathered Coastal Boulder)
Arenite (composed primarily of SiO2)
sedimentary
Green Opal / Common Opal
Hydrated Silicon Dioxide (SiO2·nH2O)
mineral
Weathered flint or chert fragment
Microcrystalline quartz (SiO₂), likely chert/flint
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Barite
Barium Sulfate (BaSO4)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Rock
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky/Smoky Crystal fragment)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Bronzite-bearing gabbro (likely norite)
Norite/gabbro: plagioclase feldspar + orthopyroxene (bronzite), commonly with minor olivine, magnetite, or biotite
igneous
Greenstone (or Greywacke/Metasediment Pebble)
Metamorphosed Mafic Rock / Chlorite Schist
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Brecciated Quartzite
Brecciated Quartzite
Metamorphic
Sandstone (Quartzose)
Arenite (SiO2 principal)
sedimentary
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Artificial/Fantasy Object
Note: The image provided is a fabric sock, not a geological specimen.
Polyester-Cotton Blend with Elastane
Synthetic/Natural Fiber (Non-Geological)
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz pebble in concrete
Quartz (SiO₂), embedded in Portland-cement concrete
mineral
Quartz with Associated Minerals
Silicon Dioxide (SiO2)
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Ironstone / Hematite
Iron(III) oxide (Fe2O3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Industrial byproduct (often mistaken for obsidian or mineral)