Basalt (Water-worn pebble)
Basalt (Mafic Extrusive Rock)
Category
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Basalt (Water-worn pebble)
Basalt (Mafic Extrusive Rock)
Dinosaur Fossil (Skull)
Dinosauria fossilis (Petrified Hydroxyapatite / Calcium Carbonate)
Quartzite pebble
Quartzite (SiO2)
Muscovite Schist
Mica Schist (KAl2(AlSi3O10)(OH)2)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)
Unakite
Epidotized Granite
Quartzite
Quartzite (SiO2)
Orange Quartzite (or Iron-Stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide impurities (Fe2O3)
Clear Quartz
Silicon Dioxide (SiO2)
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
Obsidian
Obsidian (Volcanic Glass), primarily SiO2
Yellow Quartz (Citrine or Yellow Chalcedony)
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2
Calcite
Calcium Carbonate (CaCO3)
Basalt
Mafic volcanic rock (formula varies by mineral content: Ca-plagioclase, Pyroxene, Olivine)
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
Astrophyllite
Astrophyllite (K2NaFe7Ti2Si8O26(OH)4F)
Carnelian (a variety of Chalcedony)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
Shale or Slaty Mudstone
Argillaceous sedimentary rock
Opalite
Man-made Glass (SiO2 + additives)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
Slate
Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Hematite
Iron(III) oxide (Fe2O3)
Aquamarine
Beryl (Be3Al2Si6O18)
Aventurine
Silicon Dioxide (SiO2) with inclusions
Rose Quartz
Rose Quartz (SiO2 with traces of Titanium, Iron, or Manganese)
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
Ruby
Corundum (Al2O3 with Chromium traces)
Magnetite
Magnetite (Fe3O4)
Milky Quartz
Silicon Dioxide (SiO2)
Chalcedony (Common Opal variant or Quartz)
Silicon Dioxide (SiO2)
Bauxite
Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
Dendritic Opal (Merlinite)
Hydrated Silica with Manganese/Iron oxide inclusions (SiO2·nH2O)
Gneiss (Metamorphic Rock)
Gneiss
Schist
Mica Schist (Medium-grade metamorphic rock)
Quartzite
Quartzite (primarily SiO2)
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)