Mineral And Sedimentary

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Sandstone (Picture Sandstone)

Arenite (primarily SiO2)

Limonite Geode (Ironstone Concretion)

Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Sandstone

Arenite (primarily SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Pyrite

Iron Sulfide (FeS2)

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Magnetite (Iron Ore)

Iron(II,III) oxide (Fe3O4)

Cone-in-cone structure (Limestone)

Cone-in-cone structure (Secondary Sedimentary Structure)

General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)

Anhydrite (Calcium Sulfate, CaSO4)

Limonite / Ironstone

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Sandstone

Arenite

Brown Sandstone

Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Sandstone

Arenite (SiO2 dominant)

Selenite / Gypsum

Gypsum (CaSO4·2H2O)

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (SiO2 with accessory minerals)

Sandstone (Quartz-rich)

Arenite (SiO2)

Sandstone

Arenite

Shale

Shale (Consolidated fine-grained clay/silt)

Sandstone (Ferruginous)

Clastic sedimentary rock (SiO2 with Fe2O3)

Sandstone

Arenite (SiO2 principal)

Pyrite

Iron Sulfide (FeS2)

Fragmented Sedimentary Pebble

Clastic Sedimentary Specimen

Shale or Slaty Mudstone

Argillaceous sedimentary rock

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Limonite with Trace Fossils

Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)

Seashell (Calcium Carbonate)

Calcium Carbonate (CaCO3)

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Sandstone (Quartzose)

Arenite (primarily SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Sandstone

Arenite (SiO2 based)

Jasper

Silicon dioxide (Microcrystalline Quartz, SiO2)

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primary)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)

Sandstone

Sandstone ( преимущественно SiO2 )