Chalk
Calcium carbonate (CaCO3)
Category
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Chalk
Calcium carbonate (CaCO3)
Chalk
Calcium Carbonate (CaCO3)
Chert (Flint)
Silicon dioxide (SiO2)
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Chert (Flint)
Silicon Dioxide (SiO2)
Limestone
Sedimentary Rock (Primarily CaCO3)
Sandstone
Arenite (siliciclastic sedimentary rock composed mostly of quartz)
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
Chert (Flint)
SiO2 (Microcrystalline Quartz)
Sandstone
Sedimentary Clastic Rock (Quartzose Sandstone)
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone
Sandstone (clastic sedimentary rock, predominantly SiO2)
Blue goldstone beads
Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli
Slate
Metamorphic Pelitic Rock
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
Asphalt Pavement (with aggregate)
Asphalt concrete
Sandstone
Arenite
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
Sandstone
Arenite
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
Green Agate
Silicon dioxide (SiO₂)
Chert (Flint)
Microcrystalline quartz (SiO2)
Red Sandstone
Quartz Arenite (iron-stained) / SiO2
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
Sandstone (Pebble)
Arenite
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
Swirled Agate Bead
Silicon Dioxide (SiO2)
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
Chert (often called Flint)
Chert (Microcrystalline or cryptocrystalline Silica, SiO2)
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (SiO2 principal)
White Marble
Recrystallized Calcite (CaCO3)
Chert (Flint / Jasper variant)
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
Sandstone
Arenite (composed primarily of Quartz: SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)