Pearl
Organic Mineral (CaCO3 with conchiolin)
mineral
Category
Organic Mineral
Browse organic mineral specimens identified by the Rock Identifier community.
Learn about Organic Mineral in the encyclopedia
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Pearl
Nacre (aragonite, CaCO₃, in a conchiolin matrix)
gemstone
Fossilized bone, likely a large vertebrate limb or rib fragment
Petrified bone; exact taxon indeterminate from the image
fossil
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
sedimentary
Iron-rich chert or jasper
Microcrystalline quartz (SiO₂), commonly colored by hematite/goethite
sedimentary
Banded chert or flint
Microcrystalline quartz (SiO₂), likely with iron-oxide and dark organic/mineral impurities
sedimentary
Fossilized bone fragment
Petrified vertebrate bone; mineralized hydroxyapatite replaced or infilled by silica/carbonates
fossil
Banded sandstone pebble
Quartz-rich sandstone, likely iron-oxide- and organic/mineral-stained; exact variety uncertain
sedimentary
Fossilized coral (likely honeycomb or branching coral)
Fossil coral; probable Scleractinia or Tabulata, composition mainly microcrystalline CaCO₃
fossil
Black Onyx and Mother of Pearl
Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)
mineral
Amber
Succinicum (Organic polymer, largely C10H16O)
Organic Mineral
Natural Pearl
Calcium carbonate (primarily Aragonite and Conchiolin), CaCO3
mineral
Amber
Succinite
Organic Mineral
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
mineral
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Amber (Copal)
Fossilized Tree Resin
mineraloid
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Amber (Raw)
Succinite (Fossilized Resin)
mineraloid
Amber and Citrine Quartz
Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)
mineral
Amber
Succinite (fossilized resin, C10H16O)
mineral
Amber
Succinicum (C10H16O)
mineral
Petrified Wood
Silicified wood (Quartz replacement, SiO2)
fossil
Raw Amber / Resin Mineral
Succinite (Fossilized Tree Resin)
gemstone
Amber
Succinite (C10H16O)
mineraloid
Amber
Resinite / Fossilized Tree Resin
mineral
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Polished amber
Amber (fossilized plant resin; chiefly amorphous organic compounds)
gemstone
Amber cabochon pendant
Amber (fossilized tree resin; chiefly polymerized terpenoids)
gemstone
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Amber
Succinite (specific to Baltic amber), fossilized tree resin
Organic Mineraloid
Amber
Succinite (organic hydrocarbon)
mineraloid
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Amber
Succinite (with empirical formula approximately C10H16O)
Organic Mineraloid
Likely bituminous coal
Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed from the image
sedimentary
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Amber
Succinite
Organic mineraloid
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Black Limestone
Bituminous Limestone (Calcium Carbonate - CaCO3)
sedimentary