Turquoise and Red Coral (with Grizzly Bear Claw)
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)
mineral
Category
Organic Mineral
Browse organic mineral specimens identified by the Rock Identifier community.
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Red Coral
Corallium rubrum
mineral
Sandstone
Sandstone (SiO2-dominated clastic rock)
sedimentary
Fossilized Bone
Permineralized Vertebrate Fossil
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Naga Silver-Inlaid Ebony and Bone/Horn Beads
Diospyros (Ebony) or Keratin (Horn) with Silver/White-Metal Inlay
Organic (Anthropological Artifact)
Amber
Succinite (C10H16O)
mineraloid
Fossilized Shell
Invertebrate fossil (Bivalvia or Brachiopoda)
fossil
Fossil Shell
Brachiopod or Mollusk fossil
fossil
Fossilized Shark Tooth
Carcharocles or Otodus sp. (Micro-fossilized)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
mineral
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions of hornblende or chlorite
mineral
Quartz vein in host rock
Quartz (SiO₂), likely in a weathered carbonate or sedimentary matrix
mineral
Amber
Succinite (approximate formula C10H16O)
mineral
Likely coal (possibly anthracite)
Coal, composed chiefly of carbon-rich organic matter; rank cannot be confirmed from the photograph
sedimentary
Fossiliferous limestone
Bioclastic carbonate rock; predominantly calcite (CaCO₃)
sedimentary
Polished amber (likely copal or amber)
Fossilized tree resin; amber is predominantly polymerized diterpenoid resin, while copal is younger, incompletely polymerized resin
gemstone
Polished green moss agate cabochon
Moss agate: microcrystalline quartz (SiO₂) with included chlorite/actinolite or iron-manganese minerals
mineral
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized tree resin
gemstone
Amber
Succinite (fossilized tree resin)
mineral
Amber
Succinate (Succinite for Baltic varieties)
mineraloid
Amber
Succinite (Resin)
mineral
Amber
Succinite (approximate formula C10H16O)
mineral
Amber
Succinite (C10H16O)
mineral
Amber
Succinite (approximate formula C10H16O)
mineral
Shark Tooth Fossil
Chondrichthyes (shark) tooth
fossil
Tufa Rock and Tumbled Gemstones
Calcareous Tufa (Calcium Carbonate, CaCO3)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Pearl
Calcium carbonate (CaCO3) + organic conchiolin
gemstone
Amber with Organic Inclusions
Succinite (fossilized resin)
mineraloid
Red Coral (with Hematite and Black Pearl accents)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Amber
Succinite
mineral
Amber
Succinite (fossilized tree resin)
fossil
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
sedimentary
Human Skin (Epidermis/Dermis)
Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)
Mineral-like biological tissue
Jasper
Microcrystalline Quartz (SiO2)
gemstone
Sand Tiger Shark Tooth
Carcharias taurus
fossil
Chert with Calcite Veins
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions
sedimentary
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral