Diamond (in a jewelry setting)
Diamond (Carbon, C)
mineral
Category
Not A Rock (Man Made Polymer)
Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.
Diorite (River Pebble)
Intermediate plutonic igneous rock
igneous
Note regarding baguette production (not a rock)
Digital text image - Somali language
not a rock
Blue Opal Inlay (Simulated/Lab-created)
Hydrated Amorphous Silica (SiO2·nH2O) with polymer resin
mineraloid
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Yooperlite (Syenite clast containing fluorescent Sodalite)
Sodalite-bearing Syenite
igneous
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Lapis Lazuli
Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)
metamorphic
Lapis Lazuli
Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2
metamorphic
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Amber
Succinite
Organic (Mineraloid)
Ferruginous Sandstone (Ironstone)
Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Diamond (in jewelry setting)
Diamond (C - Carbon)
mineral
Granite
Phaneritic Plutonic Felsic Rock
igneous
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Amber (Copal)
Organic gemstone, fossilized tree resin (often immature amber or copal)
Mineral
Diamond in Kimberlite
Diamond (C in Kimberlite)
igneous
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
sedimentary
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)
igneous
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Lapis Lazuli
Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Coral Rock (Coquina)
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Grey Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Quartzite
Quartzite (SiO2)
metamorphic
Chert (specifically Flint or Common Chert node)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary