Rock Identifier

Category

Man Made Object (Coin)

Browse man made object (coin) specimens identified by the Rock Identifier community.

Learn about Man Made Object (Coin) in the encyclopedia

Opalite

Goldstone

Map Jasper

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Andalusite

Zincite

Marl

Dunite

Coquina

Dalmatian Jasper

Dalmatian Jasper

Chalk

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

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

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

Green Calcite

Calcite (Calcium Carbonate, CaCO3)

Seraphinite (Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8) — mineral

Seraphinite

Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8

Optical Calcite (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite

Calcium Carbonate (CaCO3)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

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

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite (Banded Calcite) (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite (Banded Calcite)

Calcium Carbonate (CaCO3)

Gold (Elemental Metal) (Gold (Au)) — Mineral

Gold (Elemental Metal)

Gold (Au)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

Petrified Wood (Agatized/Silicified Wood) (Silicified Wood / Chalcedony (SiO2)) — sedimentary

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood / Chalcedony (SiO2)

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Green Calcite (Calcite (CaCO3)) — mineral

Green Calcite

Calcite (CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Green Calcite (often commercially called Green Onyx) (Calcium Carbonate (CaCO3)) — Mineral

Green Calcite (often commercially called Green Onyx)

Calcium Carbonate (CaCO3)

Banded Calcite (often sold as 'Green Onyx') (Calcite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Honey Calcite (Orange Onyx) (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite (Orange Onyx)

Calcium Carbonate (CaCO3)

Yooperlite (Fluorescent Sodalite-bearing Syenite) (Sodalite-rich Syenite) — igneous

Yooperlite (Fluorescent Sodalite-bearing Syenite)

Sodalite-rich Syenite

Blue-green mineral specimen, likely chrysocolla or turquoise (Chrysocolla: hydrated copper phyllosilicate, approximately Cu₂H₂O₅Si; Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O) — mineral

Blue-green mineral specimen, likely chrysocolla or turquoise

Chrysocolla: hydrated copper phyllosilicate, approximately Cu₂H₂O₅Si; Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O

Native Copper (Copper (Cu)) — mineral

Native Copper

Copper (Cu)

Gold (Gold (Native Element); Au) — mineral

Gold

Gold (Native Element); Au

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Aura Quartz / Rainbow Aura Quartz (Silicon Dioxide (SiO2) with metallic vapor coating) — mineral

Aura Quartz / Rainbow Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Corundum (Pink Sapphire / Ruby) (Al2O3 (Aluminum Oxide)) — mineral

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Diamond (in a jewelry setting) (Carbon (C)) — mineral

Diamond (in a jewelry setting)

Carbon (C)

Carnelian (Chalcedony (cryptocrystalline quartz), SiO2) — Mineral

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Tumbled cream-colored stone, likely calcite or limestone (Likely calcite (CaCO₃), possibly micritic limestone) — mineral

Tumbled cream-colored stone, likely calcite or limestone

Likely calcite (CaCO₃), possibly micritic limestone

Tumbled honey calcite (probable) (Calcite, calcium carbonate (CaCO₃)) — mineral

Tumbled honey calcite (probable)

Calcite, calcium carbonate (CaCO₃)

Likely calcite-rich limestone or marble (Calcite (CaCO₃); possibly recrystallized limestone (marble)) — metamorphic

Likely calcite-rich limestone or marble

Calcite (CaCO₃); possibly recrystallized limestone (marble)

Raw calcite specimen (Calcite (calcium carbonate, CaCO₃)) — mineral

Raw calcite specimen

Calcite (calcium carbonate, CaCO₃)

Quartz (Yellow Quartz / Citrine / Calcite) (Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)) — mineral

Quartz (Yellow Quartz / Citrine / Calcite)

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Cleavable Calcite (Calcium Carbonate (CaCO3)) — mineral

Cleavable Calcite

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

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

Serpentinite

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