Sandstone
Arenite
sedimentary
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
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Sandstone (likely Conglomerate or Gritstone)
Arenite (SiO2 based)
sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Fossilized Chiton (Polyplacophora)
Polyplacophora (fossilized valves)
mineralized fossil
Natural Pearl
Calcium carbonate (primarily Aragonite and Conchiolin), CaCO3
mineral
Sandstone
Arenite
sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet (X3Y2(SiO4)3)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (predominantly SiO2)
sedimentary
Citrine
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Inspirational River Stone (Quartzite)
Metamorphosed Quartz-rich Rock (Quartzite) with SiO2 composition
metamorphic
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary
Citrine
Silicon Dioxide (SiO2)
mineral
Diamond
Natural Carbon (C)
mineral
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (primarily SiO2 with Feldspar)
sedimentary
Diamond
Carbon (C)
mineral
Diamond
Carbon (C)
mineral
Diamond (in Jewelry Setting)
Carbon (C)
gemstone
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Dyed Quartz (imitating Emerald/Green Quartz)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Quartz (Variety: Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Magnetite with Pyrite or Chalcopyrite inclusions
Magnetite (Fe3O4) with Pyrite (FeS2)
mineral
Corundum (Ruby Variety)
Corundum (Al2O3)
mineral
Sandstone (Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone
Arenite (SiO2 with various cementing agents)
sedimentary
Ruby and Diamond Heart Pendant
Corundum (Al2O3) and Diamond (C)
mineral
Clear Quartz Crystal (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Precious Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Diamond (in jewelry)
Diamond (Carbon, C)
mineral
Diamond
Diamond (C)
mineral
Shale
Laminated Mudstone
sedimentary
Yellow Ochre / Limonite
Hydrated ferric oxide (FeO(OH)·nH2O)
mineral
Limonite with Ironstone
Limonite (hydrated iron(III) oxide-hydroxides), FeO(OH)·nH2O
mineral