Fossiliferous Sandstone / Fossil Fragment
Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material
fossil
Category
Mineral (Sedimentary Context)
Browse mineral (sedimentary context) specimens identified by the Rock Identifier community.
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Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Geode
Quartz / Chalcedony nodule
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Banded Sandstone
Clastic Sedimentary Rock (Quartz Arenite)
sedimentary
Epidote with Quartz
Ca2(Al,Fe)3(SiO4)3(OH) (Epidote) / SiO2 (Quartz)
mineral
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Ironstone concretion (possibly pyrite-bearing)
Iron-rich sedimentary concretion, likely composed of goethite/limonite with possible pyrite
sedimentary
Limonite Geode / Ironstone Concretion
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Siltstone / Slate
Siltstone / Low-grade Slate
sedimentary
Sandstone with Liesegang Rings
Quartzose Sandstone with Iron Oxide Precipitation
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Limonite
FeO(OH)·n(H2O)
mineral
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
mineral
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Coprolite
Fossilized Feces
sedimentary
Unidentified pale yellow-green mineral/rock fragment
Possibly sulfur-bearing mineral, serpentine, or weathered limestone; exact identification requires testing
mineral
Pyrite
Iron sulfide (FeS2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Amethyst Geode Fragment
Quartz (SiO2) with trace iron impurities
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Psilomelane (Black Hematite varietal)
Barium Manganese Oxide (Ba,H2O)2Mn5O10
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Quartz (Silicon Dioxide, SiO2) in a Geode
sedimentary
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
mineral
Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
mineral
Satin Spar (Satin Spar Selenite)
Gypsum (CaSO4·2H2O)
mineral
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Limonite
FeO(OH)·nH2O
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary