Dyed or treated turquoise-like tumbled stone
Likely turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O), though blue-green magnesite or howlite imitation is possible
mineral
Category
Not A Rock (Man Made Origin)
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Granite
Granite (Felsic intrusive igneous rock)
igneous
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (S-type asteroid origin)
igneous
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
igneous
Sandstone
Arenite (mostly SiO2)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L or H class)
meteorite
Amber
Fossilized Tree Resin
gemstone
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sedimentary Rock
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Eroded Brick or Pumice-like Scoria
Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)
igneous
Gabbro (River Cobble)
Phaneritic Mafic Igneous Rock
igneous
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Fossil Coral
Scleractinia (Stony Coral) fossil
fossil
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Anthropogenic Material (Man-made Rock)
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Bauxite
Alumina ore (Mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
gemstone
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
igneous
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Granite
Phaneritic plutonic felsic rock
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Fluorite (translucent octahedral crystal)
Calcium fluoride (CaF2)
mineral
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic
Sandstone Pebble
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Tumbled turquoise-like stone
Likely turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Spider Conch Shell
Lambis lambis (Calcium Carbonate, CaCO3)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L, LL, or H type)
meteorite
Chondrite Meteorite
Stony Meteorite (Chondrite)
igneous
Chondrite Meteorite
Ordinary Chondrite (OC)
Mineral (Extraterrestrial)