Fossilized Bone Fragment
Vertebrate Fossil
fossil
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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Jasper
Microcrystalline Quartz (SiO2)
gemstone
Red Coral (Sponge Coral / Apple Coral)
Corallium rubrum (calcium carbonate / organic gem)
gemstone
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone
Chert (Brown variety / Common Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Natural White Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin - CaCO3
mineraloid
Amber
Succinicum (Organic polymer, largely C10H16O)
Organic Mineral
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Pink Opal
Hydrated silica (SiO2 "n H2O)
mineral
Polished amber-like organic gemstone
Amber (fossilized tree resin), commonly succinite; exact identification is uncertain from the image
gemstone
Fossilized Bark
Lepidodendron / Sigillaria fossil impression
fossil
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)
metamorphic
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (fossilized resin)
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
mineral
Sandstone
Sandstone (SiO2-dominated clastic rock)
sedimentary
Amber
Fossilized Tree Resin (Organic Polymer)
gemstone
Tahitian Pearl (Black / Pistachio Pearl)
Biogenic Aragonite / Calcite (CaCO3 with conchiolin)
gemstone
Red heart-shaped glass bead in a wire-wrapped jewelry charm
Likely colored glass (amorphous silica-based material); the image does not show an identifiable geological specimen
gemstone
Fossilized Shell Fragment
Invertebrate marine fossil, likely calcium carbonate replacement
fossil
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
sedimentary
Chert (Yellow Jasper/Flint)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Picture Jasper
SiO2
mineral
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin
gemstone
Amber
Succinite / Fossilized Tree Resin
fossil
White limestone or chalky carbonate rock
Calcite-rich limestone; possibly chalk (CaCO₃)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Amber
Fossilized tree resin; chiefly organic terpenoid polymers (succinite)
gemstone
Amber
Succinite (Fossilized Tree Resin)
gemstone
Tumbled amber
Amber (fossilized plant resin; commonly succinite, C10H16O)
gemstone
Tumbled amber
Amber (fossilized plant resin; commonly succinite, C10H16O)
gemstone
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Jasper/Flint variant)
Microcrystalline quartz (SiO2)
sedimentary
Shale
Shale (Fine-grained clastic sedimentary rock)
sedimentary
Amber
Succinite
mineral
Chert (Jasper)
Silicon dioxide (SiO2)
sedimentary
Amber
Succinite (C10H16O)
mineral
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
mineral