Carved red coral bead (likely coral or coral-colored resin)
Corallium spp. (precious coral; calcium carbonate, CaCO₃)
gemstone
Category
Organic (Biological Organism)
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Amber
Succinite (fossilized tree resin)
mineraloid / sedimentary organic material
Gravel / Limestone Fragment
Calcium Carbonate (CaCO3) / Fine-grained Sedimentary Rock
sedimentary
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
mineral
Amber / Copal
Fossilized Tree Resin (Succinate)
Mineraloid
Amber
Amber (C10H16O)
mineral
Fossilized shell or coral fragment
Likely silicified or calcitic marine invertebrate fossil; exact taxon indeterminate from the image
fossil
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3 with Carotenoid pigments)
Mineraloid (Organic Gemstone)
Coral Rock (Coquina)
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Limestone with Lichen
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Brachiopod in Shale
Brachiopoda (Phylum) preserved in Carbonaceous Shale
sedimentary
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Fossilized coral or bryozoan fragment
Indeterminate colonial coral/bryozoan fossil; likely calcitic calcium carbonate (CaCO₃)
fossil
Fossiliferous Limestone
Fossiliferous Limestone (containing bioclasts)
sedimentary
Sandstone with Brachiopod Mold Fossil
Sedimentary rock (Sandstone) with indeterminate Brachiopod mold
fossil
Amber
Succinite (with formula approximately C10H16O)
Organic mineraloid
Petrified Wood with Lichen
Silicified Wood (SiO2) colonized by crustose lichens
fossil
Pink Aragonite
CaCO3
mineral
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
Pink Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Enrolled Trilobite Fossil
Phylum Arthropoda, Class Trilobita (likely Calymene or Flexicalymene)
fossil
Fossil Shell (Brachiopod or Mollusk)
Phylum Brachiopoda or Class Bivalvia (e.g., Mucrospirifer or similar genus)
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Organic Inclusions
fossil
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)
Fossiliferous limestone
Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing fossil fragments—possibly coral or bryozoan
fossil
Sandstone with Trace Fossils
Arenite with Ichnofossils
sedimentary
Mother of Pearl (Nacre)
Aragonite (layered with organic polymers), CaCO3
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Seashell Fragment
Calcium carbonate (CaCO3) - primarily Aragonite or Calcite
fossil
Nacre (Mother of Pearl)
Nacre (Biogenic Aragonite/Calcite composite, CaCO3)
mineral
Fossiliferous Limestone
Limestone with embedded fossil cross-section
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Fossiliferous Chert
Silicon Dioxide (SiO2) with fossil inclusions
sedimentary
Amber
Fossilized tree resin (Amorphous organic polymer)
gemstone
Human Skin (Epidermis/Dermis)
Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)
Mineral-like biological tissue
Kidney Stone
Calcium Oxalate (CaC2O4), Uric Acid, or Struvite
mineral
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Jasper containing fossilized inclusions
Silicon Dioxide (SiO2) with trace impurities and biogenic inclusions
sedimentary
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Fossilized shell or bone fragment
Likely bioclast composed mainly of calcium carbonate (calcite/aragonite); exact organism is indeterminate from the image
fossil
Fossiliferous Sedimentary Rock
Sedimentary Rock with Invertebrate Fossil Imprint
fossil