Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
mineral
Category
Man Made Material (Simulated Mineral)
Browse man made material (simulated mineral) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Simulated Mineral) in the encyclopedia
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Sandstone
Sedimentary Clastic Rock (Quartzose Sandstone)
sedimentary
Chert (Iron-stained)
Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)
sedimentary
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Diamond (Cut Gemstone)
Carbon (C)
gemstone
Sandstone
Sandstone (clastic sedimentary rock, predominantly SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Brecciated Jasper
Brecciated Jasper (Microcrystalline Quartz / SiO2)
sedimentary
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Natural Pearl
Calcium carbonate (primarily Aragonite and Conchiolin), CaCO3
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Chert (Grey-Green Flint)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Bog Iron / Limonite Concretion
Goethite/Limonite mixture (FeO(OH)·nH2O)
sedimentary
Polished white chalcedony or milky quartz pebble
Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion
mineral
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Diorite
Intermediate plutonic igneous rock
igneous
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)
mineral
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Anthropogenic (Man-made material processed by nature)
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Mineral
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Gastropod shell fragment
Calcareous mollusk shell; primarily aragonite or calcite (CaCO₃)
fossil
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sea Glass
Amorphous silicon dioxide (glass)
mineral
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
igneous
Diamond
Diamond (pure Carbon, C)
mineral
Diamond
Carbon (C)
mineral
Sunstone
(Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar
mineral