Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony)
Sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Pebble/Cobble)
Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)
Sedimentary
Pyrite
Pyrite (FeS2)
Mineral
Sandstone
Sandstone (lithified arenite/wacke)
Sedimentary Rock
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
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)
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Opal
Hydrous silicon dioxide (SiO2·nH2O)
mineral
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Iron Slag
Vitreous glassy waste (Fe-Si-Al-Ca compounds)
Mineral byproduct (anthropogenic / techno-fossil)
Coal (most likely Bituminous or Anthracite)
Bituminous Coal (Grade of Coal), Anthracite (Grade of Coal)
Sedimentary Rock
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
Calamites Fossill (Lepidodendrales)
Calamites sp. (Family Calamitaceae)
sedimentary
Amber
Succinate (Succinite for Baltic varieties)
mineraloid
Amber
Succinates (Fossilized Resin)
mineral
Petoskey Stone
Hexagonaria percarinata
Sedimentary
Amber
Succinite
mineral
Amber
Succinite (approximate formula C10H16O)
mineral
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Amber (Copal)
Fossilized Tree Resin
mineraloid
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized tree resin
gemstone
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Organic Gemstone (not a mineral)
Amber
Succinite (approximate formula C10H16O)
mineral
Amber (and Cubic Zirconia)
Fossilized Tree Resin
mineraloid
Amber / Copal
Organic resin, C10H16O
mineral
Amber
Succinite (fossilized resin)
mineral