Chert (Nodule)
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Fossilized Shell in Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
Coquina
Coquina (Bioclastic Limestone)
Chert (Commonly known as Flint)
Silicon Dioxide (SiO2)
Chert (Jasper/Common Chert Pebble)
Microcrystalline Quartz (SiO2)
Bauxite
Bauxite (Al(OH)3, AlO(OH))
Coquina
Bioclastic Limestone (Calcium Carbonate, CaCO3)
Coquina
Biogenic Limestone (mostly Calcium Carbonate, CaCO3)
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
Chert
Microcrystalline quartz (SiO2)
Chalk
Calcite (CaCO3)
Chert
Microcrystalline Quartz (SiO2)
Red Sandstone
Arenite (Fe2O3 enriched)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Chert (Yellow/Tan variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Chert Nodule (Flint)
Chert (Silicon Dioxide, SiO2)
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
Sandstone
Arenite
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
Chert
Cryptocrystalline Quartz (SiO2)
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
Chert (Flint)
Microcrystalline Quartz (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
Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
Yellow Sapphire (Raw)
Corundum (Al2O3)
Pyrite
Iron Sulfide (FeS2)
Flint / Chert
Microcrystalline quartz (SiO2)
Swirled Agate Bead
Silicon Dioxide (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)