Amethyst
Amethyst (SiO2 with Iron impurities)
Category
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Amethyst
Amethyst (SiO2 with Iron impurities)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Blue Lace Agate
Silicon Dioxide (SiO2)
Quartzite with Iron Inclusions
Metamorphic Quartzite (SiO2 with Fe2O3 trace impurities)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 major component)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone (Ferruginous)
Arenite with Iron Oxide (Fe2O3) cement
Gneiss (Granitic Gneiss)
Gneiss
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cementation)
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
Sandstone
Arenite (SiO2 predominantly)
Banded Agate (Agatized Geode Slice)
Silicon Dioxide (SiO₂)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Desert Rose
Selenite Rose (Gypsum: CaSO4·2H2O)
Conglomerate
Conglomerate (clastic sedimentary rock)
Quartz Druzy on Basalt
Silicon Dioxide (SiO2) on Mafic Volcanic Rock
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
Amethyst Geode
Silicon Dioxide (SiO2) with iron impurities
Dendritic Agate / Moss Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Agate
Chalcedony (Silicon Dioxide, SiO2)
Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
Glauconitic Sandstone
Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
River Rock (Greywacke/Sandstone)
Lithic Wacke
Yellow Quartz (Citrine Quartz or Yellow Jasper)
Silicon Dioxide (SiO2) with iron impurities
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Green Fluorite
Fluorite (Calcium Fluoride) - CaF2
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
Shale
Shale (comprised mostly of clay minerals and quartz)
Quartz Vein in Host Rock (Gossanous Matrtix)
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
Sandstone
Arenite (primarily SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Sandstone
Arenite (composed primarily of SiO2)
Bauxite
Al2O3·2H2O (principally composed of gibbsite, boehmite, and diaspore)