Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
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 →
Black Limestone with Calcite Veins
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Technonatural composite (often containing sedimentary/igneous aggregate)
Gastropod Fossil (Snail Steinkern)
Class Gastropoda (internal mold)
sedimentary
Conglomerate
Conglomeratic Sandstone
sedimentary
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Jasper Variant likely)
Silicon Dioxide (SiO2)
Sedimentary Rock or Mineral (depending on origin and purity)
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Non-geological
Fossiliferous Limestone
Limestone with embedded fossil cross-section
sedimentary
Breccia
Clastic Breccia (SiO2/CaCO3 dominated)
sedimentary
Common Gravel / Pebble
Lithified rock fragment / Detrital sediment
sedimentary
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Weathered limestone or calcareous fossil fragment
Calcite-rich carbonate rock (CaCO₃), possibly fossiliferous limestone
sedimentary
Crinoid and Coral Fossils in Limestone
Fossiliferous Limestone with Rugosa (order) and Crinoidea (class)
sedimentary
Puddingstone (Gowganda Tillite/Jasper Conglomerate)
Jasper Conglomerate (SiO2 primary composition)
sedimentary
River Rock (Mossy)
Stream-rounded Clast (likely Siltstone or Sandstone with bryophytes)
sedimentary
Blue Chalcedony Cube
Silicon Dioxide (SiO2)
mineral
Calcite-rich limestone (possibly fossiliferous limestone)
Calcite, CaCO₃, in a limestone matrix
sedimentary
Puddingstone
Polymictic Conglomerate
sedimentary
Fossilized Crinoid Stem in Limestone
Crinoidea (Class) in Calcium Carbonate (CaCO3) matrix
fossil
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Mixed collection of natural stones
Several unidentified lithologies, likely including basalt, granite, quartzite, sandstone, and weathered metamorphic rocks
igneous, metamorphic, sedimentary
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Mineral (synthetic) and Metal (precious/base)
Iron-stained chert or jasper pebble
Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone with Trace Fossils
Quartz Arenite with Bioturbation (Trace Fossils)
sedimentary
Man-made Synthetic Material (Not a rock or mineral)
Polyester (Polyethylene terephthalate) / Faux Fur
Synthetic / Textile
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
not a rock
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Layered shale and sandstone gorge
Shale and thin-bedded sandstone, likely Devonian or older sedimentary strata
sedimentary
Banded chert or siliceous mudstone
Microcrystalline quartz (chalcedony), SiO₂; possibly ferruginous shale
sedimentary
Jasper / Quartz Pebble
Silicon Dioxide (SiO2) with microcrystalline impurities
sedimentary
Fossil Coral (Rugose Coral)
Rugosa (extinct order of solitary and colonial corals)
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary
Crinoid Fossil Marble
Crinoidal Limestone / Phylum Echinodermata
sedimentary
Puddingstone (specifically Michigan/Gowganda Puddingstone)
Quartzite Conglomerate (Gowganda Formation)
sedimentary
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Gowganda Tillite (Puddingstone)
Glacial Tillite (Diamictite) with Jasper inclusions
sedimentary
Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Rounded brown pebble, likely chert or iron-stained quartzite
Chert (microcrystalline quartz, SiO₂) or quartzite (recrystallized quartz, SiO₂)
sedimentary