Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
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
Sandstone (clastic sedimentary rock)
sedimentary
Diamond
Diamond (pure carbon C)
mineral
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Dyed Quartz (imitating Emerald/Green Quartz)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Banded Sandstone (Beach Pebble)
Quartz Arenite Sandstone
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Tumbled yellow jasper or chalcedony
Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony
mineral
Sandstone
Arenite
sedimentary
Painted Rock / Geode Specimen
Silicon Dioxide with artificial pigment coating
mineral
Rough Diamond
Diamond (pure Carbon, C)
mineral
Gemstone bead necklace (likely citrine or yellow quartz)
Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them
gemstone
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Raw Diamond
Carbon (C)
gemstone
Rock Specimen
Unclassified rock specimen
sedimentary
Diamond
Carbon (C)
gemstone
Loose faceted colorless gemstones, likely quartz or glass-like mineral chips
Most consistent with quartz (SiO₂), though the photograph cannot exclude synthetic cubic zirconia or glass
gemstone
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Heart-shaped faceted gemstone pendant
Likely yellow quartz (citrine) or synthetic yellow stone, set in metal with small clear accent stones
gemstone
Blue chalcedony bead necklace
Chalcedony, microcrystalline quartz (SiO₂), commonly blue-dyed or blue-gray natural chalcedony
gemstone
Diamond (Cut Gemstone)
Natural Carbon (C)
gemstone
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Turquoise-colored ring stone (possibly turquoise or imitation)
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image
gemstone
Sandstone
Arenite (SiO2 primarily)
sedimentary
Diamond
Diamond (Pure Carbon, C)
mineral
Chert / Flint
Cryptocrystalline quartz (SiO2)
sedimentary
Pearl (Biogenic Mineraloid)
Calcium carbonate (CaCO3) primarily as Aragonite
mineral
Botryoidal chalcedony with iron-oxide staining
Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chalcedony
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Shale
Argillaceous Rock
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Small rounded pebble, possibly quartz-rich stone
Indeterminate; likely quartz/quartzite or a weathered feldspathic pebble
igneous
Sandstone
Arenite
sedimentary