Quartzite
Quartzite (primarily SiO2)
metamorphic
Category
Industrial Byproduct (Anthropogenic Rock)
Browse industrial byproduct (anthropogenic rock) specimens identified by the Rock Identifier community.
Quartzite
Quartzite (mostly SiO2)
metamorphic
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Granite Pebble
Felsic Plutonic Rock (primarily Quartz, Feldspar, and Mica)
igneous
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Quartz (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt with Peridotite Inclusion
Mafic Volcanic Rock (Extrusive Igneous) with Ultramafic Xenolith
igneous
Basalt
Mafic Volcanic Rock (primarily Plagioclase and Pyroxene)
Igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Quartz Druzy on Matrix (likely Agate or Jasper)
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Ironstone Concretion / Hematite Nodules
Ferruginous Sedimentary Rock (primarily Hematite Fe2O3 and Goethite FeO(OH))
sedimentary
Quartz Druzy (on Calcedony/Quartz base)
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock consisting of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Red Jasper
Opaque microcrystalline Quartz (SiO2 with Fe2O3 inclusions)
sedimentary
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Anthracite Coal
Anthracite (Carbon Content: 86%-97%)
metamorphic
Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO2)
metamorphic
Cobalt Blue Sea Glass
Amorphous Silica Glass (SiO2 + CoO)
mineraloid / anthropogenic material
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Anthropogenic Mineral Mimic
Scoria (Red Lava Rock)
Scoria (Vesicular Basalt/Andesite)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
River/Stream Pebble
Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)
Mineral, specifically a rock fragment
Garnet Rhyolite
Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet
igneous
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Concrete Fragment
Hardened Portland Cement Composite
Anthropogenic (Man-made material mimicking sedimentary rock)
Porphyritic Andesite (often called Chinese Writing Stone)
Porphyritic Basaltic Andesite with Feldspar Phenocrysts
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Chert (varietal Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Desert Rose
Selenite Rose (Gypsum: CaSO4·2H2O)
mineral
Quartzite (specifically an iron-stained or Carnelian-colored variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Coal (most likely Bituminous or Anthracite)
Coal (primarily composed of carbon with varying amounts of other elements)
Sedimentary rock
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Industrial Diamond (Bort or Boart)
Diamond (pure Carbon, C)
mineral
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Not a rock
Not a rock
Not a rock
Quartzite
Quartzite (SiO2)
metamorphic