Stream-Rounded Shale or Mudstone
Argillaceous sedimentary rock
Category
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Stream-Rounded Shale or Mudstone
Argillaceous sedimentary rock
Chert with Iron Oxide Staining
Microcrystalline Quartz (SiO2) with Limonite/Goethite staining
Banded Gneiss
Gneiss (Metamorphic Rock)
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)
Jasper
Jasper (Silicon Dioxide, SiO2)
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Calcite
Calcium Carbonate (CaCO3)
Ferruginous Quartz
Silicon Dioxide with Hematite/Limonite inclusions (SiO2 + Fe2O3)
Jasper
Silicon dioxide (SiO2)
Banded Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Petrified Wood
Silicified Wood (primarily SiO2)
Orange Calcite (with White Calcite/Quartz matrix)
Calcium Carbonate (CaCO3)
Onyx (Black Onyx)
Onyx (Silicon Dioxide, SiO2)
Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles
Mixed gemstones (primarily Silicon Dioxide - SiO2)
Caribbean Calcite
Calcium Carbonate (CaCO3) with Aragonite
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Yellow Calcite
Calcium Carbonate (CaCO3)
Druzy Quartz (part of a Geode)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Magnetite
Magnetite (Fe3O4)
Pink Dyed Agate
Silicon Dioxide (SiO2) with synthetic pigment
Sandstone
Arenite (SiO2 based with quartz, feldspar, or lithic fragments)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
Yellow Jasper
Tectosilicates (SiO2) with Goethite/Iron oxide inclusions
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Orange Calcite
Calcium Carbonate (CaCO3)
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Honey Calcite
Calcite (Calcium Carbonate - CaCO3)
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)