Obsidian
Obsidian (volcanic glass)
Category
Browse man made object (simulant) specimens identified by the Rock Identifier community.
Obsidian
Obsidian (volcanic glass)
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
Belemnoit (Fossil)
Belemnoidea (Order), Rostrum / Guard
Granite
Phaneritic Plutonic Felsic Rock
Granite
Granite (Phaneritic igneous rock)
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
Diamond
Cubic carbon (C)
Tumbled brown chalcedony (likely jasper or agate)
Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining
Slate
Metamorphic Pelitic Rock
Diamond
Carbon (C)
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Granodiorite
Intrusive Igneous Rock
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Diamond
Diamond (pure carbon C)
Diamond
Carbon (C)
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
Chert or Jasper
Microcrystalline Quartz (SiO2)
Granodiorite / Granite (Weathered)
Granodiorite
Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite
Red Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
Quartzite
Metamorphic Quartzite (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
Quartzite
Metamorphic Quartzite (primarily SiO2)
Quartzite
Metamorphic Quartzite (primarily SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Quartz Pebble (Beach Chalcedony)
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Chalk
Micrite (primarily Calcium Carbonate or CaCO3)
Diabase (Greenstone)
Diabase (also known as Dolerite)
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
Calcite
Calcium Carbonate (CaCO3)