Quartz Crystal
Quartz (SiO₂)
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Quartz Crystal
Quartz (SiO₂)
Quartz
Silicon Dioxide (SiO2)
Pyrite
Pyrite (FeS2)
Yellow Quartzite or Yellow Jasper
Quartzite (primarily SiO2 with Iron oxide staining)
Amber
Succinicum (Formula: C10H16O)
Quartzite River Rock
Quartzite (primarily SiO2)
Quartz (Druzy)
Silicon Dioxide (SiO2)
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Limonite (Hydrated Iron Oxide / Bog Iron)
FeO(OH)·nH2O
Petrified Wood
Silicified Wood (SiO2 permineralization)
Chert (Chert / Flint)
Silicon dioxide (SiO2) - Microcrystalline quartz
Chert (Black Chert/Flint)
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite (Fe2O3 dominant staining)
Chert (with Manganese Dendrites)
Chert (Cryptocrystalline Quartz, SiO2)
Red Sandstone
Arenite (high iron oxide content)
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Jasper-bearing)
Chert (Silicon Dioxide, SiO2)
Jasper (likely Kambaba or Crocodile Jasper variety)
Silicon Dioxide (SiO2) with inclusions
Red Sandstone
Arenite (Ferruginous Sandstone)
Chert (Nodule)
Silicon Dioxide (SiO2)
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3)
Red Sandstone (Iron-rich)
Ferruginous Sandstone (variable formula, primarily SiO2 + Fe2O3)
Pyrite in Shale
Iron Sulfide (FeS2) in Argillaceous Shale
Fancy Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Chert (with Iron Staining)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)
Chert (Flint variety)
Silicon Dioxide (SiO2)
Red Jasper (Mahogany Obsidian variant similarity)
Silicon Dioxide (SiO2) with iron oxide inclusions
Fossilized Pycnodonte Oyster
Pycnodonte (Gryphaeostrea) species; Composition is Calcium Carbonate (Calcite/Aragonite)
Brown Jasper
Silicon Dioxide (SiO2)
Chert (Flint Pebbles)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Red Chert
Microcrystalline Quartz (SiO2)
Chert (variations include Flint/Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (and Chert-based Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone
Arenite (primarily SiO2)
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Calamites (Fossilized Horsetail)
Calamites suckowii (Family: Calamitaceae)
Sandstone Beach Pebble
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)
Sandstone (Ferruginous)
Arenite (with Iron Oxides)
Sandstone
Arenite (SiO2 + various cementing minerals)
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)