Basalt
Basalt
Igneous
Category
Antropogenic Rock (Man Made)
Browse antropogenic rock (man made) specimens identified by the Rock Identifier community.
Learn about Antropogenic Rock (Man Made) in the encyclopedia
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Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Hematite Beads
Hematite (Fe2O3)
Mineral
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Synthetic (glass)
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
mineraloid (man-made)
Slate
Metamorphic Pelitic Rock
metamorphic
Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
mineral
Diamond Druzy (Crystalline Diamond)
Carbon (C)
mineral
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Antropogenic Glass / Mineraloid
Grey Chalcedony
Silicon Dioxide (SiO2)
mineral
Pumice
Pumice (Vitreous volcanic rock)
igneous
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Lava Rock (Dyed)
Basalt / Volcanic scoria
igneous
Man-made Glass (Tumbled/Shaped)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Mineraloid (synthetic)
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Mineraloid/Synthetic Material
Man-made Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating/dye
mineral
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
mineraloid
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Mineraloid / Synthetic Glass
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
mineral
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Rainbow Hematite (Man-made/Treated)
Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)
mineral
Glass / Silicon Dioxide (Man-made)
SiO2 (Amorphous Silicon Dioxide)
Amorphous Solid
Green Agate
Silicon dioxide (SiO₂)
mineral
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Slate
Metamorphic Pelitic Rock
metamorphic
Sandstone Concretion
Sedimentary concretion
Sedimentary
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Sandstone
Arenite (with iron oxide cement)
sedimentary
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Non-geological
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert
Chert (Microcrystalline Quartz)
sedimentary
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone