Chert / River Jasper
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
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Chert (Jasper/Flint variation)
Chert (SiO2)
sedimentary
Agate (Moss or Green Agate)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (approximate formula C10H16O)
mineral
Ironstone Concretion
Siderite or Goethite Concretion
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
sedimentary
Limonite (Iron Ore)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
mineral
Bicolor Quartz Pebble
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Asphalt (Bituminous pavement fragment)
Artificial conglomerate / Bitumen-Aggregate mixture
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Sandstone (Beach Pebble)
Clastic sedimentary rock (primarily Quartz and Feldspar)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Chert (Jasper/Mudstone variety with Oxidation)
Silicon dioxide (SiO2)
sedimentary
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Travertine (used in construction, not a 'specimen' in situ)
Travertine
Sedimentary
Diamond (in a gold ring)
Diamond (pure carbon, C)
mineral
Milky Quartz with Chlorite/Amphibite Inclusions
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Limestone with Quartz/Calcite Veins
Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Mineral
Quartz / Rose Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Gozzany Iron)
Limonite (FeO(OH)·nH2O)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Shale (possibly Carbonaceous or Oil Shale)
Argillaceous Sedimentary Rock
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende, chlorite, or manganese/iron oxides
mineral
Amethyst Sage Agate
Silicon Dioxide (SiO2) with trace minerals (Manganese/Iron oxides)
mineral
Sandstone
Arenite (SiO2 based typically)
sedimentary
Chert (specifically Flint or Common Chert)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral