Pyrite
Pyrite (FeS2)
Mineral
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Sandstone
Sandstone (lithified arenite/wacke)
Sedimentary Rock
Amber
(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.
Mineral
Quartz (chalcedony variety) or Limestone with Quartz Veins
SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)
Mineral or Sedimentary Rock (with mineral inclusions)
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Sandstone
Sandstone (lithified sand)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock
Sandstone
Arenite or Sandstone
Sedimentary Rock
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Chert
Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)
Sedimentary
Shale
Shale (clastic sedimentary rock)
Sedimentary
Petrified Wood
Silicified Wood (SiO2 - primarily Quartz/Chalcedony/Opal)
Mineral/Fossil (Sedimentary context)
Opal
Hydrous silicon dioxide (SiO2·nH2O)
mineral
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Coal (most likely Bituminous or Anthracite)
Bituminous Coal (Grade of Coal), Anthracite (Grade of Coal)
Sedimentary Rock
Iron Slag
Vitreous glassy waste (Fe-Si-Al-Ca compounds)
Mineral byproduct (anthropogenic / techno-fossil)
Sandstone
Sandstone (Clastic Sedimentary Rock)
Sedimentary Rock
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Mineraloid
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Sedimentary
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary
Amber
Succinite (approximate formula C10H16O)
mineral
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Organic Gemstone (not a mineral)
Amber / Copal
Organic resin, C10H16O
mineral
Amber
Succinite (organic hydrocarbon)
mineraloid
Amber
Succinite (fossilized resin)
mineral
Amber (Copal)
Succinite (fossilized tree resin)
mineral
Amber
Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O
mineraloid
Sandstone (with Iron Siderite Concretion)
Arenite with Ironstone Concretion (FeCO3)
sedimentary
Amber
Succinite (fossilized tree resin)
mineral
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone composed of Hematite and Shell remains)
sedimentary
Amber
Succinite
Mineraloid
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Fossilized Resin (C10H16O)
mineral
Amber Inlay Jewelry
Fossilized Resin (C10H16O)
Organic Gemstone (Biogenic)
Amber
Succinite
Organic (Mineraloid)
Amber
Succinates (Organic compound: C10H16O)
mineraloid
Amber
Succinicum (Formula: C10H16O)
Mineraloid
Amber
Succinite (fossilized resin)
Organic Mineraloid
Amber
Succinite (Resinite), C10-H16-O
mineral