Tumbled hematite
Hematite (Fe₂O₃), likely specular or massive hematite
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Tumbled hematite
Hematite (Fe₂O₃), likely specular or massive hematite
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
White Marble
Recrystallized Calcite (CaCO3)
Chert (Flint)
SiO2 (Microcrystalline Quartz)
Chert
Microcrystalline Quartz (SiO2)
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
Jasper
Silicon dioxide (SiO2) with impurities
Chert (often called Flint)
Chert (Microcrystalline or cryptocrystalline Silica, SiO2)
Asphalt Pavement (with aggregate)
Asphalt concrete
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Slag (Anthropogenic Glass/Iron byproduct)
Ferro-silicate Slag
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
Coquina
Biogenic Limestone (Coquina)
Ferruginous Sandstone (Ironstone)
Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Banded Jasper / Chert Beach Pebble
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert / Flint
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Flint / Chert
Microcrystalline quartz (SiO2)
Chert (specifically Flint or Nodular Chert)
Silicon dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Chalk
Carbonate rock (mainly CaCO3)
Chert (Jasper/Flint var.)
Silicon Dioxide (SiO2)
Chert (often called Flint or River Stone)
Microcrystalline alpha-quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
Chert (specifically Flint)
Chert (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Turquoise-style beaded bracelet
Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads
Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert / Flint
Cryptocrystalline quartz (SiO2)
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Coquina
Bioclastic Limestone (Coquina)
Chalk
Calcium carbonate (CaCO3)