Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Man Made Object (Coin)
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Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Barite
Barium Sulfate (BaSO4)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Black Dolomite
Bituminous Dolomite (CaMg(CO3)2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Silver (Native Silver)
Native Silver (Ag)
mineral
Blue Calcite
Calcite (CaCO3)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Banded Calcite (Tumbled)
Calcium Carbonate (CaCO3)
Mineral
Fluorite (Rainbow, Purple-Blue Tumbled)
Calcium Fluoride (CaF2)
Mineral
Blue Chalcedony Cube
Silicon Dioxide (SiO2)
mineral
Pyrite (on Quartz matrix)
Iron Disulfide (FeS2)
mineral
Green Onyx (Banded Calcite)
Banded Calcite / Aragonite (CaCO3)
mineral
Honey calcite (likely cleavage fragment)
Calcite, CaCO₃
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Crushed Limestone
Calcium Carbonate (CaCO3)
sedimentary
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Greenschist
Greenschist facies metamorphic rock
metamorphic
Banded Serpentine
Serpentinite (Mg3Si2O5(OH)4)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Celestine (or Celestite)
Celestine (Strontium Sulfate, SrSO4)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Banded Calcite (often sold as Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Celestite
Celestine (Strontium Sulfate, SrSO4)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Polished serpentine or green jasper pebble
Likely serpentine-group silicate, chiefly antigorite/lizardite; possibly iron-rich jasper
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Beach Pebble (likely Quartz or Chalcedony)
Silicon Dioxide (SiO2)
Mineral
Fossil Shark Tooth
Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna
fossil
Corundum (Ruby variety)
Aluminium oxide (Al2O3)
mineral
Diamond (as set in a gold ring)
Carbon (C)
mineral
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
South Korean 100 Won Coin (Cupronickel)
Cupronickel Alloy (75% Cu, 25% Ni)
mineral-based alloy (anthropogenic)