Fossil Coral
Rugosa or Tabulata coral fossil
Category
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Fossil Coral
Rugosa or Tabulata coral fossil
Petrified Wood
Silicified Paleoxylon (SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Septarian Nodule (Polished)
Septarian concretion (Calcite, Aragonite, Limestone)
Jasper (Iron-stained Chalcedony)
SiO2 with Fe2O3 (Iron Oxide) impurities
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Jasper with Iron Staining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Petrified Wood
Siliconized Wood (SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)
Jasper (specifically Fancy or Polychrome Jasper)
Silicon Dioxide (SiO2) - Chalcedony
Fossilized Echinoid (Sea Urchin)
Echinoidea (Fossil)
Petrified Wood
Silicified Wood (SiO2)
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
Gravel and River Pebbles
Unconsolidated rock fragments / Detrital sediment
Halite
Halite (NaCl)
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Quartz Boulder
Silicon Dioxide (SiO2)
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2) with artificial pigment
Petrified Wood
Silicified Wood (primarily SiO₂ / Silicon Dioxide)
Tiger's Eye (Golden)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities and gamma radiation exposure
Petrified Wood
Silicified Wood (primarily Quartz or Chalcedony, SiO2)
Petrified Wood
Silicified Wood (SiO2 permineralization)
Tiger's Eye
Silicon Dioxide (SiO2) with Limonite/Goethite inclusions
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Quartz Vug / Druzy Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Granite
Intrusive igneous rock
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon dioxide (SiO2)
Concrete
Anthropogenic Conglomerate
Milky Quartz in Epidote Host Rock
Crystalline Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Mixed Mineral Bead Bracelet
Polycrystalline and Monocrystalline Silicates/Oxides (Quartz, Howlite, Hematite)
Green Quartzite
Silicon Dioxide (SiO2) with mineral inclusions
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Quartz Vein in Host Rock (clastic sediment)
Silicon Dioxide (SiO2) in matrix
Gold Ore in Quartz
Auriferous Quartz (Gold: Au; Quartz: SiO2)
Petrified Wood
Silicified Wood (SiO2 permineralization)
Diorite
Intermediate plutonic igneous rock