Amber with dark mineral/organic inclusions
Fossilized plant resin (amber; chiefly polymerized diterpenoid resin)
gemstone
Category
Organic Gemstone (Not A Rock Or Mineral)
Browse organic gemstone (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Not A Rock Or Mineral) in the encyclopedia
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Ironstone Concretion (Moqui Marble / Boji Stone)
Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))
sedimentary
Chert (and its variety Flint)
Silicon dioxide (SiO2) / Microcrystalline quartz
sedimentary
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
sedimentary
Chert (Yellow/Tan)
Microcrystalline Quartz (SiO2)
sedimentary
Pearl (incorporated into jewelry)
Aragonite and Calcite (CaCO3)
mineral
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Red Coral (Precious Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
gemstone
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
metamorphic
Freshwater Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic composite
gemstone
Fossiliferous Sedimentary Rock
Sedimentary Rock with Invertebrate Fossil Imprint
fossil
Sandstone
Arenite (SiO2 composed primarily of quartz)
sedimentary
Amber
Fossilized Tree Resin
gemstone
Amber
Succiniferous fossil resin (C10H16O)
gemstone
Limestone with Fossil Fragment
Sedimentary carbonate rock (CaCO3)
sedimentary
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
sedimentary
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Red Coral
Corallium rubrum
gemstone
Blue Apatite
Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))
mineral
Chert (Jasper / Petrified Wood)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (Fossilized Resin)
gemstone
Pearl
Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3
mineral
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Bark
Lepidodendron / Sigillaria fossil impression
fossil
Green Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Green Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Red Coral (Sponge Coral / Apple Coral)
Corallium rubrum (calcium carbonate / organic gem)
gemstone
Amber
Fossilized tree resin
gemstone
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)
metamorphic
Banded Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Chert (Brown variety / Common Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Fossil Coral / Crinoid Stem section
Anthozoa / Crinoidea fossil
fossil
Natural White Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin - CaCO3
mineraloid
Shale
Shale (Fine-grained clastic sedimentary rock)
sedimentary
Fossilized Bone Fragment
Vertebrate Fossil
fossil
Sandstone
Arenite
sedimentary