Schist (Kyanite Schist)
Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)
metamorphic
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Learn about Man Made Composite (Lithified Equivalent Of Sedimentary) in the encyclopedia
View all →
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Weathered carbonate rock, possibly fossiliferous limestone
Calcite-rich limestone (CaCO₃), tentative identification
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone (Sedimentary Rock)
fossil
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Man-made Object/Uncertain Mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Jasper and Chalcedony Composite
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by nature)
mineral
Fossiliferous Limestone
Fossiliferous Calcite (CaCO3)
sedimentary
Fossil Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Graphite
Graphite (Native Carbon, C)
metamorphic
Limestone (Fossiliferous)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Sandstone
Arenite (major component SiO2)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in calcitic matrix
sedimentary
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Mercenaria or similar genus)
fossil
Sandstone
Arenite (primarily SiO2)
sedimentary
Likely weathered sandstone or iron-stained sedimentary fragment
Quartz-rich sandstone; exact identification requires testing
sedimentary
Rhyolite
Rhyolite (Extrusive Igneous Rock)
igneous
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Weathered iron-rich sandstone or laterite
Ferruginous sandstone; chiefly quartz (SiO₂) cemented or stained by iron oxides such as hematite and goethite
sedimentary
Fossiliferous Limestone
Calcium Carbonate - CaCO3
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Geode (Quartz / Chalcedony Geode)
SiO2 (Silicon Dioxide)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Light-colored limestone (probable fossiliferous or micritic limestone)
Calcite-rich carbonate rock; predominantly CaCO₃ (calcite)
sedimentary
Crinoid Fossil Fragment
Crinoidea (echinoderm fossil embedded in limestone/matrix)
fossil
Fossilized Brachiopod
Phylum Brachiopoda (likely Order Spiriferida or Orthida)
fossil
Polymict conglomerate with a projecting pebble
Conglomerate; clast-supported polymict conglomerate, dominated by quartz/feldspar and lithic fragments in a cemented matrix
sedimentary
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
sedimentary and metamorphic
Fossiliferous Limestone with Coral Imprint
Fossiliferous Limestone (CaCO3)
sedimentary
Jasper and Mudstone Composite
Silicified Sedimentary Rock / Jasperoid Pebble
sedimentary
Conglomerate with Fossilized Shark Teeth
Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary