Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Category
Man Made Glass (Not A Natural Rock Or Mineral)
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
Learn about Man Made Glass (Not A Natural Rock Or Mineral) in the encyclopedia
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Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Man-made Blank Ammunition (Brass)
CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)
Anticrystalline / Synthetic Alloy
Fossilized Bored Limestone
Limestone with Ichnofossils (Gastrochaenolites or Entobia)
sedimentary
Sandstone
Arenite (SiO2 based typically)
sedimentary
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
igneous
Granite
Felsic intrusive igneous rock
igneous
Diamond
Carbon (C)
gemstone
Diamond
Carbon (C)
gemstone
Sandstone
Arenite (primarily Quartz Arenite)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Engineered Quartz (Quartzite look-alike)
Silicon Dioxide (SiO2) composite
mineral-based composite
Sandstone
Sedimentary rock composed mainly of sand-sized minerals or rock grains
sedimentary
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Obsidian
Volcanic Glass
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
igneous
Sandstone
Arenite (Silicon Dioxide, SiO2 based)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chalk
Micrite (primarily Calcium Carbonate, CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Diamond
Carbon (C)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Chert / River Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Diamond (Cluster Ring)
Carbon (C)
mineral
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Beach Pebble (Chalcedony / Chert)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Diamond
Carbon (C)
gemstone
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Diamond
Carbon (C)
mineral
Rough Diamond
Pure Carbon (C)
mineral
Quartz Druzy
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Diamond
Carbon (C)
mineral
Obsidian
Obsidian (volcanic glass, amorphous silica rich rock)
Igneous
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Antropogenic (Man-made industrial byproduct)