Possible tektite (natural impact glass)
Impact glass; composition and origin cannot be confirmed from the image
meteorite
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct in the encyclopedia
View all →
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Diamond (or Diamond Simulant)
Carbon (C)
gemstone
Industrial Diamond (Bort or Boart)
Diamond (pure Carbon, C)
mineral
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Kimberlite
Kimberlite
igneous
Raw Corundum (Sapphire/Ruby variant)
Aluminum oxide (Al2O3)
mineral
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
mineral
Vesicular iron-rich slag or weathered metallic ore
Indeterminate; likely Fe-oxide-bearing slag (magnetite/hematite) rather than a specific natural mineral
mineral
Prasiolite (Green Quartz) / Sea Glass Amalgam
SiO2 (Silicon Dioxide)
mineral
Diamond (or diamond simulant)
C
gemstone
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Silicon
Element Si
mineral
Granitic Pegmatite with Schorl
Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Diamond
C (Carbon)
gemstone
Unidentified metallic mineral or meteorite fragment
Indeterminate; possible native metal-bearing sulfide or iron meteorite fragment
mineral
Mica schist (likely biotite–muscovite schist)
Mica schist; chiefly quartz and mica minerals (muscovite KAl₂(AlSi₃O₁₀)(OH)₂ and/or biotite)
metamorphic
Textile (Upholstery Fabric)
Woven Polyethylene/Polyester or Cotton Blend
Synthetic or Natural Fiber
Native Copper in Matrix
Native Copper (Cu)
mineral
Pegmatite
Igneous Pegmatite
igneous
Red garnet cabochon pendant
Likely almandine garnet, iron-rich garnet-group silicate (often approximated as Fe₃Al₂(SiO₄)₃); identification from the image is uncertain.
gemstone
Iron-stained weathered rock
Unknown
Unknown (likely sedimentary or metamorphic)
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Quartzite
Quartzite
metamorphic
Concretion
Sedimentary Concretion
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (predominantly Hematite and Chert)
sedimentary
Coal
Bituminous coal (Complex organic sedimentary rock)
sedimentary
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Weathered quartz-bearing rock, possibly calcite vein fragment
Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)
mineral
Pale green glassy mineral fragment, possibly prehnite or fluorite
Probable prehnite (Ca₂Al₂Si₃O₁₀(OH)₂) or pale-green fluorite (CaF₂); exact identification requires testing
mineral
Rose quartz bead bracelet
Quartz, SiO₂ (rose quartz variety)
gemstone
Diamond
Native Carbon (C)
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Crushed Stone Ballast
Crushed Limestone or Granite Aggregate
sedimentary
Synthetic Costume Glove (Paws)
Polyethylene terephthalate (Polyester) & Polyurethane blend
Non-geological / Man-made textile
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Synthetic / Anthropogenic Material