Red Agate
Chalcedony (SiO2)
Category
Browse anthropogenic (man made artifact) specimens identified by the Rock Identifier community.
Red Agate
Chalcedony (SiO2)
Coquina
Biogenic Limestone (Coquina)
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
Vesicular Basalt (or Scoria)
Vesicular Basalt
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
Belemnoit (Fossil)
Belemnoidea (Order), Rostrum / Guard
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Jadeite and Nephrite (Jade)
Sodium Aluminum Silicate (Jadeite) / Calcium Magnesium Iron Silicate (Nephrite)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
Granite
Phaneritic Plutonic Felsic Rock
Granite
Granite (Phaneritic igneous rock)
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
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
Diamond
Diamond (pure carbon C)
Diamond
Carbon (C)
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
Chert or Jasper
Microcrystalline Quartz (SiO2)
Granodiorite / Granite (Weathered)
Granodiorite
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
Diamond
Cubic carbon (C)
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)
Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite