Chert (Common Opal variant)
Microcrystalline Quartz (SiO2)
Category
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
Chert (Common Opal variant)
Microcrystalline Quartz (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Sandstone (with Chert/Quartzite)
Arenite (SiO2 primarily)
Banded Siltstone
Banded Siltstone / Laminated Siltstone
Sandstone (with Iron Staining)
Clastic sedimentary rock (High Silica / Iron Oxide)
Breccia
Sedimentary Breccia
Sandstone
Arenite (SiO2 composed primarily of quartz)
Sandstone
Sedimentary Rock (Quartz arenite)
Sandstone (Flagstone)
Arenite (composed primarily of SiO2)
Limestone
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
Sandstone
Arenite (composed primarily of SiO2)
Limonite (Iron Ore)
FeO(OH)·nH2O
Sandstone
Sandstone (SiO2 dominated)
Sandstone (Ferruginous)
Arenite (variable SiO2 with Fe2O3 staining)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz / Common Agate
Silicon Dioxide (SiO2)
Sandstone
Sedimentary Rock (Quartz Arenite)
Sandstone
Arenite (SiO2 based sedimentary rock)
Chert / Chalcedony Nodules
Microcrystalline Quartz (SiO2)
Sandstone
Sedimentary Rock (Quartz arenite)
Sandstone
Clastic sedimentary rock (Arenite)
Conglomerate
Conglomerate (clastic sedimentary rock)
Poppy Jasper
Microcrystalline Quartz (SiO2) with hematite and other inclusions
Petrified Wood
Silicified Wood (SiO2)
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Sandstone nugget
Arenite (primarily Quartz SiO2)
Limestone
Calcium Carbonate (CaCO3)
Jasper
Microcrystalline Quartz (SiO2)
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone (with banding/weathering)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Arenite (SiO2 primarily)
Travertine
Tufa limestone (CaCO3)
Chalcedony on Matrix
Silicon Dioxide (SiO2)
Veined Pebble (Septarian or Quartz-Veined Chert/Basalt)
Silicon Dioxide (SiO2) veins in matrix
Sandstone Pebble
Quartzose Sandstone (Sedimentary Rock)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Litharenite)
Red jasper-bearing breccia (probable)
Microcrystalline quartz (SiO₂) with iron-oxide coloration, in a brecciated host
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Shale
Argillaceous Sedimentary Rock
Septarian Nodule
Septarian Concretion (Calcite, Aragonite, Limestone)