Rock Identifier

Category

Marble

Browse marble specimens identified by the Rock Identifier community.

Fossiliferous Limestone (Biogenic Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Calcium Carbonate (CaCO3)

Limestone (specifically Fossiliferous Limestone) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Fossiliferous Limestone)

Calcium Carbonate (CaCO3)

Chert (Flint) with Glauconite (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint) with Glauconite

Microcrystalline Quartz (SiO2)

Chert (specifically Gray Chert) (Chert (SiO2)) — sedimentary

Chert (specifically Gray Chert)

Chert (SiO2)

Limestone (specifically Chalky Limestone) (Calcium Carbonate (CaCO3 / Calcite)) — sedimentary

Limestone (specifically Chalky Limestone)

Calcium Carbonate (CaCO3 / Calcite)

Crinoid Stem Fossil (in matrix) (Crinoid (Class Crinoidea)) — sedimentary

Crinoid Stem Fossil (in matrix)

Crinoid (Class Crinoidea)

Chert / Flint (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Eclogite (Eclogite (Pyrope garnet and Omphacite pyroxene)) — metamorphic

Eclogite

Eclogite (Pyrope garnet and Omphacite pyroxene)

Porphyritic Rhyolite (Red Rhyolite) (Rhyolite (Porphyry)) — igneous

Porphyritic Rhyolite (Red Rhyolite)

Rhyolite (Porphyry)

Honey Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Honey Calcite

Calcite (Calcium Carbonate, CaCO3)

Limestone (specifically Marl or Chalk) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Marl or Chalk)

Calcium Carbonate (CaCO3)

Fossilized Solitary Rugose Coral (Horn Coral) (Order: Rugosa (e.g., Grewingkia or Heliophyllum); composed of Calcite (CaCO3) or Silica (SiO2)) — sedimentary

Fossilized Solitary Rugose Coral (Horn Coral)

Order: Rugosa (e.g., Grewingkia or Heliophyllum); composed of Calcite (CaCO3) or Silica (SiO2)

Ammonite Fossil (Ammonoidea (primarily composed of Calcite, CaCO3)) — sedimentary

Ammonite Fossil

Ammonoidea (primarily composed of Calcite, CaCO3)

Red Coral (Precious Coral) (Corallium rubrum (Calcium Carbonate, CaCO3)) — sedimentary

Red Coral (Precious Coral)

Corallium rubrum (Calcium Carbonate, CaCO3)

Diamond (Macled/Crystal fragment) (Carbon (C), isometric crystal system) — mineral

Diamond (Macled/Crystal fragment)

Carbon (C), isometric crystal system

Fossilized Coral (Petoskey Stone / Favosites) (Favosites (extinct genus of tabulate coral)) — sedimentary

Fossilized Coral (Petoskey Stone / Favosites)

Favosites (extinct genus of tabulate coral)

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Basalt (Weathered) (Extrusive mafic volcanic rock) — igneous

Basalt (Weathered)

Extrusive mafic volcanic rock

Orange Tabby (Felis catus) (Felis silvestris catus (variety: Red Mackerel Tabby)) — Organic/Biological specimen (Non-Mineral)

Orange Tabby (Felis catus)

Felis silvestris catus (variety: Red Mackerel Tabby)

Organic/Biological specimen (Non-Mineral)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Coral Fossil) (Scleractinian Coral in Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone (Coral Fossil)

Scleractinian Coral in Calcium Carbonate (CaCO3)

Pallasite Meteorite (Sliced and Polished) (Pallasite (Iron-Nickel Matrix with Olivine crystals)) — mineral

Pallasite Meteorite (Sliced and Polished)

Pallasite (Iron-Nickel Matrix with Olivine crystals)

Brachiopod Fossil in Limestone (Phylum Brachiopoda, Class Rhynchonellata) — sedimentary

Brachiopod Fossil in Limestone

Phylum Brachiopoda, Class Rhynchonellata

Olivine (Peridotite) ((Mg, Fe)2SiO4 (Magnesium Iron Silicate)) — igneous

Olivine (Peridotite)

(Mg, Fe)2SiO4 (Magnesium Iron Silicate)

Olivine (Peridotite) ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — igneous

Olivine (Peridotite)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Limestone (specifically Bituminous or Carbonaceous Limestone) (Calcium Carbonate (CaCO3) with Organic Impurities) — sedimentary

Limestone (specifically Bituminous or Carbonaceous Limestone)

Calcium Carbonate (CaCO3) with Organic Impurities

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Ammonite Fossil (Polished Half / Cleoniceras) (Ammonoidea (Subclass), often Cleoniceras genus; fossilized with Calcite (CaCO3) and Aragonite) — Sedimentary

Ammonite Fossil (Polished Half / Cleoniceras)

Ammonoidea (Subclass), often Cleoniceras genus; fossilized with Calcite (CaCO3) and Aragonite

Porphyritic Basalt (Basalt (with plagioclase phenocrysts)) — igneous

Porphyritic Basalt

Basalt (with plagioclase phenocrysts)

Limestone with Calcite Veining (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Veining

Calcium Carbonate (CaCO3)

Brachiopod Fossil in Shale (Phylum Brachiopoda (often species of Order Spiriferida or Rhynchonellida)) — sedimentary

Brachiopod Fossil in Shale

Phylum Brachiopoda (often species of Order Spiriferida or Rhynchonellida)

Fossilized Crinoid Stem Columnal (Phylum Echinodermata; Class Crinoidea (CaCO3)) — sedimentary

Fossilized Crinoid Stem Columnal

Phylum Echinodermata; Class Crinoidea (CaCO3)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Bioclastic inclusions) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclastic inclusions

Limestone with Chert or Siltstone bands (Sedimentary carbonate rock (CaCO3) often with siliceous impurities) — sedimentary

Limestone with Chert or Siltstone bands

Sedimentary carbonate rock (CaCO3) often with siliceous impurities

Limestone (with potential fossil inclusions) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (with potential fossil inclusions)

Calcium Carbonate (CaCO3)

Trilobite Pygidium (Tail Segment) (Phylum Arthropoda, Class Trilobita (likely order Phacopida)) — sedimentary (fossil)

Trilobite Pygidium (Tail Segment)

Phylum Arthropoda, Class Trilobita (likely order Phacopida)

sedimentary (fossil)

Fossilized Coral (Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)) — sedimentary

Fossilized Coral

Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)

Oyster Shell (Aragonite/Calcite) (Calcium Carbonate (CaCO3)) — sedimentary

Oyster Shell (Aragonite/Calcite)

Calcium Carbonate (CaCO3)

Aragonite (Aragonite (CaCO3)) — mineral

Aragonite

Aragonite (CaCO3)

Coral Rock (Coquina) (Biogenic Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Coral Rock (Coquina)

Biogenic Limestone (Calcium Carbonate - CaCO3)

Limestone with Algal/Lichen Colonization (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Algal/Lichen Colonization

Calcium Carbonate (CaCO3)

Serpentine (Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4