Spinosaurid Dinosaur Tooth
Spinosaurus aegyptiacus (fossilized)
fossil
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Chert (Flint variety)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Muscovite Mica (on Quartz Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Calcite
Calcite (CaCO 3)
Mineral
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Obsidian
Obsidian (volcanic glass), predominantly Silicon Dioxide (SiO2)
igneous
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Sandstone (Fossiliferous)
Arenite / Clastic Sedimentary Rock
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milk/Citrine variety)
Silicon Dioxide (SiO2)
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Flower Agate
Chalcedony (SiO2) with Scolecite/Opaque inclusions
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
mineral
Amethyst (Quartz)
Silicon Dioxide (SiO2)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Tumbled Obsidian (possibly Mahogany Obsidian variant)
Volcanic Glass (Amorphous Silicon Dioxide, SiO2)
igneous
Jasper
Silicon Dioxide (SiO2)
sedimentary
Asphalt (Road Aggregate)
Asphalt concrete / Bituminous mixture
anthropogenic sedimentary (technolith)
Picture Jasper
Silicon dioxide (SiO2)
sedimentary
Geode Nodules / Chalcedony Geode
Silicon Dioxide (SiO2) - Amorphous to Cryptocrystalline Quartz
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Howlite (Tumbled)
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Howlite
Howlite (Ca2B5SiO9(OH)5)
mineral
Fancy Jasper
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Herkimer Diamond
Quartz (SiO2)
mineral