Asphalt Pavement (with aggregate)
Asphalt concrete
man-made composite
Category
Man Made Rock (Sedimentary Analogue)
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Learn about Man Made Rock (Sedimentary Analogue) in the encyclopedia
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Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
sedimentary
Chert (Flint / Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Flint
Silicon dioxide (SiO2)
sedimentary
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Possible weathered basalt or slag fragment
Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image
igneous
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Crinoid Fossil in Limestone
Crinoid columnal (Class Crinoidea) in biomicrite
fossil
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Small metallic-looking mineral/rock fragment
Indeterminate from image; possibly galena, hematite, or metallic slag
mineral
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Beach Pebble (Chalcedony / Chert)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)
metamorphic
Tumbled brown chalcedony (likely jasper or agate)
Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining
mineral
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Chalk
Carbonate rock (mainly CaCO3)
sedimentary
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
River Pebbles (Chert and Quartzite)
Sedimentary Clastic Rock (Silica-rich)
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
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 (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Coquina and Oyster Fossil Rock
Coquina limestone (Calcium Carbonate, CaCO3) containing fossilized Crassostrea / bivalve shells
fossil
Chert (Black Flint)
Silicon Dioxide (SiO2)
sedimentary
Asphalt aggregate
Human-made bituminous asphalt containing crushed silicate rock aggregate
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
sedimentary
Flint (chert) hand axe
Cryptocrystalline silica (SiO₂), worked into a bifacial stone tool
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Paving-concrete aggregate with a rounded stone
Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock
sedimentary
Bivalve Fossil (Shell Fragment)
Class Bivalvia (Calcium Carbonate - CaCO3)
sedimentary
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral