Human Skin (Epidermis/Dermis)
Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)
Mineral-like biological tissue
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Organic Gemstone (often associated with Sedimentary sequences)
Megalodon Shark Tooth Fossil
Otodus megalodon
sedimentary
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
sedimentary
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Pearl
Calcium carbonate (CaCO3) - mainly Aragonite
mineral
Pearl
Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3
mineral
Pearl
Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3
mineral
Pearl
Aragonite and Calcite (CaCO3) with Conchiolin
mineral
Amber
Succinite (fossilized tree resin)
mineraloid / sedimentary organic material
Amber
Succinite
Organic Mineraloid
Amber
Succinite (with a generalized formula of C10H16O)
mineral
Dinosaur Bone (Gembone)
Petrified Dinosaur Bone (Apatite/Silica replacement)
sedimentary
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Black Pearl (Tahitian Type)
Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)
Organic Gemstone
Firewood (Wood Log)
Lignum (Plant tissue composed of cellulose and lignin)
Organic (Non-geological)
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Dendritic Agate or Manganese Nodule in Chert/Limestone
Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions
sedimentary
Pearl
Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)
mineral
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Mineral/Fossil
Pearl (as a biogenic mineral/gemstone)
Calcium Carbonate (mostly Aragonite), CaCO3
mineral
Obsidian
Volcanic glass (Mainly SiO2)
igneous
Fossilized Shark Tooth
Fossil Chondrichthyes (various genera such as Carcharias or Odontaspis)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Undetermined Due to Blur (Possible Flesh-Tone Mineral)
Unknown (Insufficient Visual Clarity)
Mineral
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Mineral
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Seashell Fragment (Aragonite/Calcite)
Calcium Carbonate (CaCO3) - Shell fragment
sedimentary
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Pearl
Calcium carbonate (CaCO3) - Aragonite/Calcite variety
mineral
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Limonite (Yellow Ochre)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Lemon (Mock specimen mimicking Citrine/Sulfur)
Citrus x limon
Organic (Biological specimen)
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Pearl (nacre)
Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin
Organic Mineraloid
Pearl (in a decorative hair comb setting)
Calcium carbonate (CaCO3) primarily as Aragonite, bonded with Conchiolin
Organic Mineraloid
Petrified Wood
Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)
metamorphic
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
sedimentary