Amethyst Geode Fragment
Amethyst (Silicon Dioxide, SiO2) with Quartz matrix
Category
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Amethyst Geode Fragment
Amethyst (Silicon Dioxide, SiO2) with Quartz matrix
Calcite Geode
Calcium Carbonate (CaCO3)
Jasper
Silicon dioxide (SiO2)
Septarian Nodule
Septarian Concretion (CaCO3, CaMg(CO3)2, SiO2)
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
Septarian Nodule
Septarian Concretion (Calcite, Aragonite, Limestone)
Garnet Schist
Almandine Garnet in Mica Schist
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Green Jasper
Silicon Dioxide (SiO2) with impurities
Geode Nodules / Keokuk Geode
Quartz / Chalcedony Geode (SiO2)
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
Ferruginous Sandstone
Arenite with Iron-Oxide Cement
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
Quartz Geode
Silicon Dioxide (SiO2)
Druzy Quartz Geode (Vug)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Quartzite Geode or Crystalline Quartz Node
Silicon Dioxide (SiO2)
Quartz Geode (Cracked Open)
Quartz (Silicon Dioxide - SiO2)
Gneiss
Gneiss
Concretion
Septarian or Siderite Concretion
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
Sandstone
Arenite (SiO2 primarily)
Chert (Yellow/Tan Variety)
Chert (SiO2)
Quartz Geode (Druzy Quartz)
Silicon Dioxide (SiO2)
Almandine Garnet in Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
Red Jasper
Silicon Dioxide (SiO2 with Hematite impurities)
Quartz Pebble with Host Rock / Schist Matrix
Silicon Dioxide (SiO2) with Metamorphic Host Rock
Yellow Jasper
Microcrystalline Quartz (SiO2)
Amethyst Geode
Silicon Dioxide (SiO2) with iron impurities
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone with Iron Staining
Arenite (SiO2 with Fe2O3)
Pyrite (on host rock)
Iron Sulfide (FeS2)
Sandstone (with Iron Oxidation)
Arenite (SiO2 with Fe-oxides)
Concretion
Sedimentary Concretion (e.g., Siderite or Ironstone)
Ironstone Concretion (Coprolite-like)
Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))
Wonderstone Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 primarily)
Quartz Geode
Silicon Dioxide (SiO2)