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

Crinoid Columnal (Crinoidea (Class) - Fossilized Columnal Segment) — sedimentary

Crinoid Columnal

Crinoidea (Class) - Fossilized Columnal Segment

Uncertain dark metallic mineral specimen (Possibly galena (lead sulfide, PbS), though the image is too blurred for reliable identification) — mineral

Uncertain dark metallic mineral specimen

Possibly galena (lead sulfide, PbS), though the image is too blurred for reliable identification

Diamond (Native Carbon (C)) — gemstone

Diamond

Native Carbon (C)

Diamond (or Simulant) (Carbon (C) or Cubic Zirconia (ZrO2)) — gemstone

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

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

Diamond (in a jewelry setting)

Carbon (C)

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

Milky calcite specimen

Calcite (calcium carbonate, CaCO₃)

Limestone Gravel (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone Gravel

Sedimentary Calcium Carbonate (CaCO3)

Fuchsite (Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Fuchsite

Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

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

Banded Calcite (Honey Calcite)

Calcium Carbonate (CaCO3)

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Fluorite (Green) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Green)

Calcium Fluoride (CaF2)

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

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Polished orbicular stone, likely granite or diorite (Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite) — igneous

Polished orbicular stone, likely granite or diorite

Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite

Polished orbicular/porphyritic granite or breccia (Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image) — igneous

Polished orbicular/porphyritic granite or breccia

Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image

Standing Liberty Quarter (Silver Specimen) (Native Silver alloy (Ag with Cu traces)) — mineral

Standing Liberty Quarter (Silver Specimen)

Native Silver alloy (Ag with Cu traces)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Honey calcite (orange calcite) (Calcite, calcium carbonate (CaCO₃)) — mineral

Honey calcite (orange calcite)

Calcite, calcium carbonate (CaCO₃)

Serpentine ((Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine

(Mg,Fe)3Si2O5(OH)4

Apatite (Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)) — mineral

Apatite

Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)

Amethyst and Calcite collection (Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)) — mineral

Amethyst and Calcite collection

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Limestone Pebble (Limestone (CaCO3)) — sedimentary

Limestone Pebble

Limestone (CaCO3)

Fuchsite (Green Muscovite / Mica Schist) (Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite (Green Muscovite / Mica Schist)

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Pink Himalayan Salt Rock (Halite (NaCl with trace iron oxide minerals)) — mineral

Pink Himalayan Salt Rock

Halite (NaCl with trace iron oxide minerals)

Crinoid Stem Fossil in Limestone (Crinoidea (class) in Calcium Carbonate (CaCO3) matrix) — fossil

Crinoid Stem Fossil in Limestone

Crinoidea (class) in Calcium Carbonate (CaCO3) matrix

Fuchsite (Green Muscovite) (Fuchsite (Chromium-rich Muscovite), K(Al,Cr)2(AlSi3O10)(OH)2) — mineral

Fuchsite (Green Muscovite)

Fuchsite (Chromium-rich Muscovite), K(Al,Cr)2(AlSi3O10)(OH)2

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Amber Calcite (Calcium Carbonate (CaCO3)) — mineral

Amber Calcite

Calcium Carbonate (CaCO3)

Pink Calcite (Calcium Carbonate (CaCO3)) — mineral

Pink Calcite

Calcium Carbonate (CaCO3)

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

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Banded Calcite (often sold as Mexican Onyx or Aragonite) (Calcite/Aragonite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as Mexican Onyx or Aragonite)

Calcite/Aragonite (Calcium Carbonate, CaCO3)

Howlite (Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

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

Honey Calcite Sphere

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Orange Calcite and White Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite and White Calcite

Calcium Carbonate (CaCO3)