Slate
Metamorphic Pelitic Rock
metamorphic
Category
Man Made Rock (Technosol)
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Learn about Man Made Rock (Technosol) in the encyclopedia
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Red glassy cabochon, likely synthetic ruby or red glass
Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass
gemstone
Tumbled opalite (likely synthetic glass)
Opalite; typically man-made opalescent soda-lime glass, not a recognized mineral species
gemstone
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Sandstone
Arenite (with iron oxide cement)
sedimentary
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Granodiorite
Intrusive Igneous Rock
igneous
Weathered concrete or cementitious slab (not natural rock)
Artificial calcium-silicate cement composite; likely Portland cement concrete
sedimentary
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Sandstone Concretion
Sedimentary concretion
Sedimentary
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Mineral (synthetic) and Metal (precious/base)
Chert
Chert (Microcrystalline Quartz)
sedimentary
Granite
Granite (a plutonic rock)
Igneous
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Greenstone
Metabasalt / Metavolcanic rock
metamorphic
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Sandstone
Arenite
sedimentary
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Beaded gemstone bracelet
Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components
gemstone
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Exposed aggregate concrete (stone-chip surface)
Portland-cement concrete containing natural aggregate; not a natural rock
sedimentary
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
igneous
Quartz Pebble (Beach Chalcedony)
Silicon Dioxide (SiO2)
mineral
Turquoise ring
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; the setting appears to be silver-colored metal
gemstone
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Blue glass-like bead or gemstone keychain ornament
Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image
gemstone
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Chert (White Chert/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Polished stone sphere, possibly agate or jasper
Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image
mineral