Diamond
Carbon (C)
gemstone
Category
Man Made Rock Like Material
Browse man made rock like material specimens identified by the Rock Identifier community.
Learn about Man Made Rock Like Material in the encyclopedia
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Chert (often called Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Diamond
Native Carbon (C)
gemstone
Gold (Elemental Metal)
Gold (Au)
Mineral
Brecciated jasper (likely red-and-cream jasper)
Jasper, an opaque microcrystalline variety of quartz; primarily cryptocrystalline SiO₂ with iron-oxide staining and possible chalcedony/quartz veining
gemstone
Diamond
Carbon (C)
gemstone
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Granite, possibly granodiorite
Coarse-grained felsic plutonic rock; chiefly quartz (SiO₂), potassium feldspar and plagioclase feldspar, with biotite and/or hornblende
igneous
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Chert (Flint)
Chert (SiO2)
sedimentary
Crushed Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Chert Pebble/Nodule
Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)
Sedimentary
Moissanite
Silicon Carbide (SiC)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Anthropogenic (Man-made industrial byproduct)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Petrified Wood
Fossilized wood / Silicified wood
Sedimentary / Fossil
Chert (or Flint)
Chert (a cryptocrystalline variety of quartz, SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
igneous
Chert (Nodule)
Chert (SiO2)
sedimentary
Banded Calcite (often commercially sold as 'Mexican Onyx' or 'Honey Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Sandstone (Pebble)
Arenite
sedimentary
Chert (varieties include Flint and Mudstone)
Microcrystalline Silica (SiO2)
sedimentary
Coquina
Biogenic Limestone (Calcite/Aragonite base, CaCO3)
sedimentary
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Crinoid Fossil in Limestone
Crinoid columnal (Class Crinoidea) in biomicrite
fossil
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary
Lapis lazuli and green-blue chalcedony jewelry
Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)
gemstone
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Granodiorite
Granodiorite
Igneous
Yooperlite (Syenite clast containing fluorescent Sodalite)
Sodalite-bearing Syenite
igneous
Basalt
Basalt (comprising Plagioclase feldspar, Pyroxene, and Olivine)
igneous