Amber
Succinite (with approximate formula C10H16O)
mineraloid
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
Chert (Yellow Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (with Quartz/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (with empirical formula approximately C10H16O)
Organic Mineraloid
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineral
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
mineral
Amber
Succinite (specifically for Baltic amber); chemical formula approximately C10H16O
Mineraloid
Chert (Cherty Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Banded)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Pearl
Aragonite and Conchiolin (CaCO3 + organic protein)
mineraloid
Pearl
Calcium carbonate (CaCO3) in the form of aragonite or calcite
mineral
Limestone (specifically Marl or Chalk)
Calcium Carbonate (CaCO3)
sedimentary
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Chert (Siliceous Mudstone variant)
Microcrystalline quartz (SiO2)
sedimentary
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Artificial/Fantasy Object
Fossiliferous Limestone (containing Brachiopods)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
mineral
Honeycomb Calcite
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
sedimentary
Natural White Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin - CaCO3
mineraloid
Amber
Succinite
Organic (Mineraloid)
Fossiliferous Limestone (Gritstone/Marl)
CaCO3 (Calcium Carbonate) with Fossil Inclusions
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Zebra Rock (Zebra Stone / Ribbon Stone)
Siltstone with Ferruginous Banding (Primarily Quartz, Kaolinite, and Hematite)
sedimentary
Amber
Succinite (specific to Baltic amber), fossilized tree resin
Organic Mineraloid
Limestone (Flagstone)
Fossiliferous Limestone (CaCO3)
sedimentary
Amber
Succinicum (C10H16O)
mineral
Fossilized Oyster Shell
Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)
sedimentary
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Sandstone (with Brachiopod or Bivalve mold)
Clastic Sedimentary Rock with Macrofossil Mold
sedimentary
Turquoise and Red Coral
Turquoise: CuAl6(PO4)4(OH)8·4H2O; Red Coral: Corallium rubrum (organic gemstone)
mineral
Chert (variant Flint/Novaculite)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Limestone with Algal/Lichen Colonization
Calcium Carbonate (CaCO3)
sedimentary
Black Pearl (Tahitian Type)
Aragonite / Conchiolin composite (CaCO3)
mineraloid
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary