Ambergris
Ambra grisea (Metabolic byproduct)
Category
Browse organic geological specimens identified by the Rock Identifier community.
Ambergris
Ambra grisea (Metabolic byproduct)
Ambergris
Ambergris (Coprolite-adjacent organic substance)
Mother of Pearl and Onyx
Aragonite (Mother of Pearl) and Chalcedony (Onyx)
Ambergris
Ambrein (C30H52O)
Ambergris
Physeter macrocephalus excreta (Ambergris)
Ambergris (Sea Wax)
Physeter macrocephalus fecalith
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
Amber
Resinite / Fossilized Tree Resin
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3 with Carotenoid pigments)
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
Black Pearl (Tahitian Pearl)
Aragonite / Calcite (CaCO3) with Conchiolin
Horse Chestnut (Buckeye seed)
Aesculus hippocastanum seed
Naga Silver-Inlaid Ebony and Bone/Horn Beads
Diospyros (Ebony) or Keratin (Horn) with Silver/White-Metal Inlay
Pink Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Amber
Succinite (Approximate formula: C10H16O)
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
Glauconite (Greensand)
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Pyrite
Iron Sulfide (FeS2)
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Fossilized Plant or Tree Bark
Lepidodendron or Sigillaria (example genera)
Siderite Concretion in Shale
Iron carbonate (FeCO3) in Mudstone/Shale matrix
Amber
Succinite (C10H16O)
Red Coral (Precious Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Petrified Wood
Silicified Wood (SiO2)
Travertine
Travertine (a terrestrial form of Limestone, CaCO3)
Glauconite (Greensand Articulated Sandstone)
Glauconite ((K, Na)(Fe, Al, Mg)2(Si, Al)4O10(OH)2)
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
Fossil Coral
Cnidaria Anthozoa (Fossilized)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in sedimentary/volcanic host
Chert Nodules in Limestone
Cryptocrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
Black Freshwater Pearls
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Chert Pebble
Microcrystalline Quartz (SiO2)
Banded Chert
Silicon Dioxide (SiO2)
Petrified Wood
Siliconized Wood (SiO2)
Chert (Jasper variation)
Chert (Microcrystalline Silicon Dioxide, SiO2)
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
Agatized Fossil (Druzy Agate)
Silicon Dioxide (SiO2) replacing organic matter
Petrified Wood (Silicified Fossil)
Silicified Wood (SiO2)
Oak-grain Laminate (Industrial/Decorative Furniture Finish)
Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)
Stromatolite
Biogenic Sedimentary Rock (composed predominantly of CaCO3)