Slate
Foliated Metamorphic Rock (composed mainly of Quartz, Illite, and Chlorite)
metamorphic
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
Amber
Succinurite (C10H16O)
mineraloid
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
Mineraloid
Amber (with potentially inclusions)
Succinite (Fossilized Tree Resin)
Mineraloid
Amber
Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)
Organic Mineraloid
Quartz Pebble (with Manganese dendrites/staining)
Silicon Dioxide (SiO2) with Manganese Oxide impurities
mineral
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
Sandstone
Arenite or Sandstone
Sedimentary Rock
Amber
Succinite (C10H16O)
Mineraloid
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
Organic Mineraloid
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Queen Conch Shell (Biogenic Calcium Carbonate)
Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)
mineral
Shale
Shale (clastic sedimentary rock)
Sedimentary
Dendritic Agate (Tumbled)
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions
mineral
Sandstone
Sandstone (lithified sand)
sedimentary
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Amber
Succinite (C10H16O)
mineraloid
Pyrite
Pyrite (FeS2)
Mineral
Anthracite Coal
Anthracite (high-rank coal / Carbon)
metamorphic
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite River Rock with Dendrites
Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions
metamorphic
Dendritic Agate
Chalcedony (SiO2) with manganese/iron oxide inclusions
mineral
Amber
Succinite
Organic (Mineraloid)
Chert
Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)
Sedimentary
Slate
Slate (foliated metamorphic rock rich in quartz, sericite, and chlorite)
metamorphic
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Amber
Succinite (Fossilized Tree Resin)
mineral
Granitic Gneiss
Gneiss (Polymetamorphic Granitic Gneiss)
metamorphic
Amber
Succinicum (Organic polymer, largely C10H16O)
Organic Mineral
Slate
Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)
metamorphic
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Milky Quartz (polished heart)
Quartz (Silicon Dioxide, SiO2)
mineral
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2 - Silicon Dioxide)
metamorphic
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Flower Agate
Chalcedony with Opaque Spherulitic Inclusions (SiO2)
Mineral
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)
metamorphic