Fossilized Burrow
Trace fossil (Ichnogenus)
fossil
Category
Man Made Glass (Not A Natural Rock Or Mineral)
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
Learn about Man Made Glass (Not A Natural Rock Or Mineral) in the encyclopedia
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Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Coquina
Biogenic Limestone (CaCO3)
sedimentary
Obsidian
Volcanic Glass (Amorphous silicon dioxide with impurities)
igneous
Trilobite fossil
Trilobita (exact species indeterminable from the image)
fossil
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Diamond (Cluster Ring)
Carbon (C)
mineral
Green gemstone ring (likely synthetic or imitation emerald)
Possibly emerald, beryl (Be₃Al₂Si₆O₁₈); the photo cannot confirm the center stone’s identity or whether it is natural.
gemstone
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Antropogenic (Man-made industrial byproduct)
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Smooth river pebble
Indeterminate lithology; likely fine-grained quartz-rich sandstone, siltstone, or weathered chert
sedimentary
Pumice
Pumice (Vitreous volcanic rock)
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Green sea glass or green glass-like tumbled material
Amorphous silicate glass; likely anthropogenic soda-lime glass, not a natural mineral
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Asphalt
Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)
Sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Chert
Chert (Microcrystalline Quartz)
sedimentary
Sandstone
Sedimentary rock composed mainly of sand-sized minerals or rock grains
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Diamond
Carbon (C)
gemstone
Beaded gemstone jewelry, likely carnelian and green aventurine
Carnelian: orange chalcedony (microcrystalline SiO₂); green aventurine: quartz with fuchsite or other inclusions (SiO₂)
gemstone
Sandstone
Arenite (Silicon Dioxide, SiO2 based)
sedimentary
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Diamond
Carbon (C)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Rough Diamond
Pure Carbon (C)
mineral
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Red coral (likely precious coral)
Corallium sp.; calcium-carbonate skeleton, primarily calcite
gemstone
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Moldavite
Tektite (Natural Silicate Glass)
meteorite
Sandstone
Sedimentary rock composed mainly of quartz and feldspar
sedimentary
White cabochon gemstone, likely milky chalcedony or opalite
Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass
gemstone
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Unidentified pale mineral or rock surface
Indeterminate from image; possibly a small quartz or feldspar grain
mineral
Beaded bracelet, likely green aventurine and yellow citrine or dyed quartz
Quartz, SiO₂ (green aventurine may contain fuchsite inclusions)
gemstone
Polished brown chalcedony (likely carnelian or jasper)
Microcrystalline quartz, SiO₂; iron oxides produce the brown coloration
mineral
Diamond
Carbon (C)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary