Lapis Lazuli (Raw)
Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S
metamorphic
Category
Organic Gemstone (Not A Rock)
Browse organic gemstone (not a rock) specimens identified by the Rock Identifier community.
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Amber (Copal)
Succiniferous Resin
mineraloid
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Pearl
Organic gemstone (Calcium carbonate / CaCO3 + Conchiolin)
mineral
Lapis Lazuli
Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
metamorphic
Natural White Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin - CaCO3
mineraloid
Green Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (specifically for Baltic amber); Approximate formula: C10H16O
Organic Gemstone (Mineraloid)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Clam shell (likely a bivalve shell)
Bivalvia; shell composed primarily of calcium carbonate (usually aragonite and/or calcite)
fossil
N/A (Non-Geological Specimen)
N/A
Pearl (incorporated into jewelry)
Aragonite and Calcite (CaCO3)
mineral
Black Limestone with Calcite Veining
Bituminous Limestone (CaCO3 with Organic Carbon inclusions)
sedimentary
Marine gastropod shell
Calcium-carbonate shell, primarily aragonite; species cannot be determined from the image
fossil
Fossilized ammonite
Ammonoidea (likely a small, chambered ammonite fossil)
fossil
Amber
Succinited (fossilized tree resin)
fossil
Amber
Succinite / Fossilized Resin (C10H16O)
fossil
Amber
Succinite
mineral
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary
Polished amber-like organic gemstone
Likely amber (fossilized plant resin), possibly copal or brown chalcedony; exact identification requires testing
gemstone
Polished amber-like organic gemstone
Amber (fossilized tree resin), commonly succinite; exact identification is uncertain from the image
gemstone
Shale
Laminated Fissile Pelite
sedimentary
Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Bauxite
Alumina ore (Mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Chert (Cherty Flint/Jasper variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Pearl
Calcium Carbonate (CaCO3) + Conchiolin
mineral
Tumbled amber
Fossilized plant resin; commonly succinite (organic polymerized resin)
gemstone
Polished amber
Fossilized tree resin; chiefly polymerized diterpenoid resin (succinite when Baltic-type)
gemstone
Amber (and Cubic Zirconia)
Fossilized Tree Resin
mineraloid
Chert (Green Fossilized Algae or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Limestone
Carbonate Rock (CaCO3 with organic inclusions)
sedimentary
Pink granite
Coarse-grained felsic intrusive rock, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
igneous
Polished amber
Amber (fossilized plant resin; chiefly amorphous organic compounds)
gemstone
Amber cabochon pendant
Amber (fossilized tree resin; chiefly polymerized terpenoids)
gemstone
Sedimentary Rock (Limestone or Siltstone pebble)
Sedimentary rock fragment
sedimentary
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Polished brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide coloration and possible breccia fragments
mineral
Lapis Lazuli (polished cabochon)
Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)
metamorphic
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Fossilized Tree Resin
gemstone