Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Mineral
Category
Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)
Browse organic gemstone (not a rock or mineral in the traditional sense, but bio mineralized material) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material) in the encyclopedia
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Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Black Onyx and Mother of Pearl
Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)
mineral
Ruby
Corundum (Al2O3)
mineral
Petrified Wood
Silicified Wood (primarily SiO₂ / Silicon Dioxide)
mineral
Tumbled carnelian (likely orange chalcedony)
Carnelian, a cryptocrystalline variety of quartz; SiO₂, commonly colored by iron oxides
gemstone
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Pearl
Calcium Carbonate (CaCO3) - mainly Aragonite and Calcite
mineral
Moonstone
Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8
mineral
Amber
Succinite (fossilized resin)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossil Coral
Scleractinia or Anthozoa (Fossilized)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Bloodstone
Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)
Metamorphic Rock
Petrified Wood
Silicified Wood (mainly Quartz/Chalcedony, SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Lepidodendron Fossil (Scale Tree)
Lepidodendron
fossil
Picture Jasper
SiO2
mineral
Chert (and its variety Flint)
Silicon dioxide (SiO2) / Microcrystalline quartz
sedimentary
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone Pebble (River Rock)
Sandstone (Quartz-rich sedimentary rock with iron oxide staining)
sedimentary
Chalcedony in Matrix (likely Agatized Coral or Chert)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite-stained Chert
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Septarian or Nodular variety)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Turquoise and Red Coral
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)
mineral
Bloodstone (Heliotrope)
Cryptocrystalline Quartz (SiO2 with inclusions of Iron Oxide/Chlorite)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rough Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Polished carnelian/chalcedony
Carnelian, a reddish-orange variety of microcrystalline quartz (SiO₂)
mineral