Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Category
Anthropogenic (Man Made Industrial Deposit)
Browse anthropogenic (man made industrial deposit) specimens identified by the Rock Identifier community.
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Tumbled greenstone (likely serpentinite or green jasper)
Serpentinite, commonly dominated by serpentine-group minerals (Mg₃Si₂O₅(OH)₄); exact identification requires testing
metamorphic
Rose Quartz Beads
SiO2 (Silicon Dioxide with trace inclusions of Ti, Fe, or Mn)
mineral
Graywacke (River Cobble)
Lithic Sandstone (Graywacke)
sedimentary
Rose quartz heart
Quartz, silicon dioxide (SiO₂), pink variety
mineral
Tumbled rose quartz
Quartz (SiO₂), pink variety
mineral
Diamond
Carbon (C)
mineral
Peridot (Olivine)
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Diamond (in jewelry setting)
Carbon (C)
mineral
Agate
Cryptocrystalline Quartz (SiO2)
mineral
Orange fire opal jewelry
Precious opal, hydrated amorphous silica (SiO₂·nH₂O)
gemstone
Quartz (Field Stone)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Crushed Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Grey Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Weathered river pebble, likely quartz-rich sandstone or iron-stained quartzite
Provisional identification: quartz-rich sandstone/quartzite; exact composition cannot be confirmed from the image
sedimentary
Diamond
C (Pure Carbon)
gemstone
Diamond ring
Diamond, crystalline carbon (C)
gemstone
Quartz Cobble
Quartz (Silicon Dioxide, SiO2)
Mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Graywacke (Sandstone)
Lithic Sandstone (Graywacke)
sedimentary
Tumbled copper-bearing rock, likely chrysocolla-bearing basalt or copper ore
Chrysocolla (hydrated copper phyllosilicate, approximately Cu₂H₂Si₂O₅(OH)₄·nH₂O) in a dark volcanic host
mineral
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Granite (Pegmatitic)
Phaneritic Felsic Igneous Rock
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Iron Slag
Ferrous Slag (Industrial Byproduct)
mineraloid (anthropogenic byproduct)
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
mineral
Gold Ore in Quartz
Auriferous Quartz (SiO2 with Au inclusions)
mineral
Diamond (in a cluster setting)
Crystallized Carbon (C)
mineral
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
mineral
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized oyster shell
Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite
fossil
Rough Aquamarine
Beryl (Be₃Al₂Si₆O‑₁₈)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Diamond (Cluster Ring)
Carbon (C)
mineral
Tumbled jasper, likely picture jasper or brecciated jasper
Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide pigments
mineral
Synthetic Blue Aura Quartz
Silicon Dioxide (SiO2) with Metallic Infusion
mineral (synthetic/man-made coating)
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Tumbled chalcedony (likely gray/brown agate)
Microcrystalline quartz, SiO₂ (chalcedony; possible agate variety)
mineral