Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Category
Organic Gemstone (Sedimentary Classification)
Browse organic gemstone (sedimentary classification) specimens identified by the Rock Identifier community.
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Amber
Succinite (a fossilized organic resin containing succinic acid)
mineraloid
Chert (Flint Nodular)
Chert (Silicon dioxide, SiO2)
sedimentary
Yellow Jasper (Mookaite style)
Silicon Dioxide (SiO2) with Goethite/Hematite inclusions
sedimentary
Pearl
Calcium carbonate (CaCO3) + organic conchiolin
gemstone
Chondrite Meteorite
Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)
Mineral
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Chert (Flint variety)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Polished fossil bone fragment
Fossilized bone, likely mammalian or reptilian; exact taxon cannot be determined from the image
fossil
Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinite (organic hydrocarbon)
mineraloid
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Black Chert/Flint)
Microcrystalline quartz (SiO2)
sedimentary
Amber
Succinite
mineraloid
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron inclusions - SiO2)
Sedimentary/Metamorphic
Fossilized Shell Fragment
Invertebrate marine fossil, likely calcium carbonate replacement
fossil
Red Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Iron-rich meteorite candidate
Provisional: stony-iron or iron meteorite; exact classification requires testing
meteorite
Likely iron-rich meteorite fragment
Undetermined stony-iron or iron meteorite; mineralogy may include Fe–Ni metal, troilite, and silicates
meteorite
White Coral
Corallium rubrum (biocarbonate calcium) / CaCO3
mineral
Amber
Succinite (approximate formula C10H16O)
mineraloid
Chert (and Flint variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Polished fossiliferous limestone
Bioclastic carbonate rock, primarily calcite (CaCO₃)
sedimentary
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Resinite / Fossilized Tree Resin
mineral
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Fancy Jasper
Silicon dioxide (SiO2)
sedimentary
Black Pearl (Tahitian or Irradiated Type)
Organic gemstone (Calcium Carbonate with Conchiolin Binding)
mineraloid
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
sedimentary
Amber cabochon pendant
Amber (fossilized tree resin; chiefly polymerized terpenoids)
gemstone
Imitation or Cultured Pearl Earrings
Calcium carbonate (CaCO3) or synthetic polymer/glass
gemstone
Precious Coral (Red Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Amber
Amber (C10H16O)
mineral
Chert (variations include Flint/Novaculite)
Chert (formula: SiO2)
sedimentary
Amber
Fossilized tree resin (Amorphous organic polymer)
gemstone
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions
sedimentary
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Chalcedony)
Microcrystalline Silica (SiO2)
sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil