Fluorite (Rainbow Fluorite Tower)
Fluorite (Calcium Fluoride, CaF2)
mineral
Category
Man Made Object (Ring)
Browse man made object (ring) specimens identified by the Rock Identifier community.
Basalt with Peridotite Inclusion
Mafic Volcanic Rock (Extrusive Igneous) with Ultramafic Xenolith
igneous
Green Slag Glass (Cullet)
Amorphous Silica (Industrial Glass Byproduct)
Synthetic/Byproduct (Non-igneous, non-sedimentary, non-metamorphic)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Orthoclase Feldspar (or K-Feldspar)
Orthoclase (KAlSi3O8)
Mineral
Basalt (Weathered)
Extrusive mafic volcanic rock
igneous
Basalt (Water-worn pebble)
Mafic Igneous Rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Banded Agate (Botswana Agate)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of Titanium, Iron, or Manganese
mineral
Milk Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Scoria (Red Lava Rock)
Scoria
igneous
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite
sedimentary
Pumice
Pumicite (fine-grained pumice), Scoria (similar origin but denser and darker, usually basaltic)
Igneous
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Geode (Unopened)
Siliceous Geode (SiO2)
sedimentary
Ironstone Concretion (Moqui Marble)
Ironstone concretion (Fe2O3 with a sandstone core)
sedimentary
Agate
Silicon dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (SiO2 rich)
igneous
Fluorite Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Chert (Agate/Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
sedimentary
Sodalite in Matrix (often called Blue Marble or Sodalite-Syenite)
Sodalite-bearing Syenite / Na8Al6Si6O24Cl2 (Sodalite component)
igneous
Jasper pebble
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary (secondary classification: cryptocrystalline quartz)
Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Coral Fossil (Favosites)
Favosites (Calcite/Calcium Carbonate, CaCO3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (Black Chert/Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
Mineral
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary