Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Man Made Composite)
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
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Purple Chalcedony
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2) microcrystalline quartz
sedimentary
Sandstone
Arenite (predominantly SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Sandstone
Arenite with Iron-Oxide Cement
sedimentary
Fenestella Bryozoan Fossil
Fenestella (class Stenolaemata)
fossil
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Crinoid Stem Fossil
Crinoid (Class Crinoidea)
fossil
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))
sedimentary
Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Satin Spar (Selenite)
Calcium sulfate dihydrate (CaSO4·2H2O)
mineral
Fossil Bivalve Shell
Class Bivalvia (e.g., Veneriidae family)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Siderite Concretion
Ironstone (Siderite) Concretion, FeCO3
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite in Matrix
Iron Disulfide (FeS2)
mineral
Chert / River Pebble
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (Greywacke)
Arenite/Greywacke (SiO2 major)
sedimentary
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
Mineral
Yellow Chalcedony / Carnelian
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Pink / Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Generic Pebble
Lithic Fragment
sedimentary
Tumbled Agate
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral