Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Category
Mineral, Possibly Rock Fragment Containing A Mineral
Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.
Red Sandstone
Arenite (with Iron Oxide cement)
sedimentary
Sandstone with Iron Oxide (Limonite/Hematite)
Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)
sedimentary
Felted Quartz / Chlorite Quartz
Chlorite included Quartz (SiO2 + (Mg,Fe)3(Si,Al)2O5(OH)4)
mineral
Arkosic Sandstone
Arkose (Clastic Sedimentary Rock)
sedimentary
Sandstone
Arenite
sedimentary
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities
mineral
Jasper, possibly Brecciated Jasper or Ocean Jasper due to patterns and color
Silicon Dioxide (SiO2), a variety of Chalcedony
Sedimentary Rock
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Quartz / Quartzite Fragment
Silicon Dioxide (SiO2)
mineral / metamorphic
Coquina
Coquina (a type of limestone)
Sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Granodiorite (Gneissic texture)
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
igneous
Quartz (Smoky/Milky variety with inclusion)
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Sandstone with Quartz Vein
Arenite with SiO2 intrusion
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Jasper (Petrified Wood variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz / Quartz Geode fragment
Silicon Dioxide (SiO2)
mineral
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
sedimentary
Sandstone (likely Greywacke or Lithic Sandstone)
Arenite / Wacke
sedimentary
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Porphyritic Basalt (with Amygdales)
Amygdaloidal Porphyritic Basalt
igneous
Amygdaloidal Rhyolite (often called Lake Superior Agate relative)
Rhyolite with Calcite/Quartz amygdules (SiO2 and secondary minerals)
igneous
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Garden Quartz (Lodalite)
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Scoria (Lava Rock)
Scoria (Vesicular Basaltic Rock)
Igneous
N/A (Non-Geological Object)
N/A
Quartz-veined Sedimentary Rock
Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)
sedimentary
Schist
Mica Schist (Quartz-Muscovite-Biotite Schist)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Limestone with Algal/Lichen Colonization
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
sedimentary