Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Category
Organic (Zoogenic)
Browse organic (zoogenic) specimens identified by the Rock Identifier community.
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Amber
Succinates (Organic Fossilized Resin)
mineral
Druzy Chalcedony/Quartz on Fluorite core
Silicon Dioxide (SiO2) on Calcium Fluoride (CaF2)
mineral
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)
Amber
Succinite (organic fossilized resin)
mineraloid
Amber
Succinite (amorphous organic polymer)
mineral
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Rough Amber (likely Copal or immature Amber)
Organic gemstone / Succinite (if Baltic)
mineral
Amber
Succinates (Organic compound: C10H16O)
mineraloid
Amber
Succinicum (Organic Gemstone - Resinite)
mineraloid
Amber
Amber (Amorphous Organic Hydrocarbon)
mineral
Amber
Succinate (Organic Fossilized Resin)
mineraloid
Amber
Succinite (a fossilized organic resin)
mineral
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Amber
Succinite (fossilized resin)
mineral
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amber jewelry (possibly amber-colored glass or resin)
Amber — fossilized plant resin, chiefly composed of polymerized terpenoids; the pictured material cannot be confirmed from the image
gemstone
Likely bituminous coal
Coal, predominantly carbon-rich organic matter with variable maceral and mineral content
sedimentary
Freshwater Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic composite
gemstone
Amber
Fossilized Tree Resin
gemstone
Fossilized Shark Tooth
Selachimorpha fossil
fossil
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Sedimentary Rock (Limestone or Siltstone pebble)
Sedimentary rock fragment
sedimentary
Garden Quartz (Lodolite / Inclusion Quartz)
Quartz with inclusions (SiO2 with various mineral inclusions)
gemstone
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)
sedimentary
Amber
Succinite (C10H16O)
mineral
Seashell (Cone Snail Shell)
Conus sp. (Calcium Carbonate, CaCO3)
fossil
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Organic Gemstone (often associated with Sedimentary sequences)
Pearl (incorporated into jewelry)
Aragonite and Calcite (CaCO3)
mineral
Amber
Succiniferous organic material (Succinite)
fossil
Pearl
Organic Mineral (CaCO3 with conchiolin)
mineral
Coquina (Fossiliferous Limestone)
Coquina (Organic Clastic Limestone)
sedimentary
Amber
Succinite (fossilized organic resin)
mineral
Amber
Succinite (Organic Mineraloid) - C10H16O
mineral
Coal (likely Bituminous or Lignite)
Organic Sedimentary Rock (Carbonaceous)
sedimentary
Imitation or Cultured Pearl Earrings
Calcium carbonate (CaCO3) or synthetic polymer/glass
gemstone
Amber
Succinates
mineraloid
Siderite Concretion in Shale
Iron carbonate (FeCO3) in Mudstone/Shale matrix
sedimentary
Quartz pebble or seed/crumb
SiO2 (if quartz)
mineral