Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
gemstone
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
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Bituminous Coal
Humic coal (Carboniferous fossil fuel)
sedimentary
Small weathered fossil or mineral fragment
Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral
fossil
Likely fossilized shark tooth
Possibly *Carcharocles* or *Otodus* sp.; exact identification requires scale and detail
fossil
Peridot in Matrix
Olivine ((Mg,Fe)2SiO4)
mineral
Quartz in Matrix
Silicon Dioxide (SiO2) in host rock matrix
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Diamond
Carbon (C)
gemstone
Quartzite pebble
Metamorphic Quartzite (SiO2)
metamorphic
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Agate
Chalcedony (SiO2)
mineral
Diamond (set in a eternity ring band)
Carbon (C)
gemstone
Sandstone (lithic/quartz variant)
Clastic sedimentary rock (SiO2 predominant)
sedimentary
Milky Quartz Boulder
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Kimberlite with Diamonds
Kimberlite (ultramafic potassic igneous rock)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartz (Iron-Stained)
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chalcedony Pebble
Cryptocrystalline Quartz (SiO2)
mineral
Chert (Iron-Stained)
Chert (Silicon Dioxide, SiO2)
sedimentary
Red Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone.
SiO2 (Silicon Dioxide)
Mineral or Sedimentary (if chert)
Smoky Quartz with Feldspar
SiO2 (Quartz) with KAlSi3O8 (Potassium Feldspar)
mineral
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Iron Slag
Anthropogenic Vitreous Silicate (Byproduct of Smelting)
Mineral-like byproduct
Quartz with Feldspar and Mica (Pegmatite Fragment)
Granitic Pegmatite
igneous
Basalt or Slag
Extrusive Igneous Rock / Industrial Slag
igneous
Ferrocoke or Slag
Anthropogenic pyrometallurgical residue
igneous
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Iron Slag
Ferrous Slag (complex silicate and oxide byproduct)
industrial byproduct (anthropogenic)
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Antropogenic rock (Man-made)
Chert (Flint)
Chert (SiO2)
sedimentary
Mica (Muscovite)
Muscovite, KAl2(AlSi3O10)(OH)2
Mineral
Sandstone-based Concrete Fragment
Cementitious Composite with Sedimentary Aggregate
sedimentary (man-made/anthropogenic)
Ferro-Manganese Slag
Vitreous Silicate Slag
Anthropogenic (Industrial byproduct)
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Pumice
Pumice (a highly vesicular volcanic glass)
igneous