Blue Topaz (specifically London Blue or Swiss Blue based on color saturation)
Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)
mineral
Category
Synthetic Polymer (Polylactic Acid)
Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.
Learn about Synthetic Polymer (Polylactic Acid) in the encyclopedia
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Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
White Calcite
Calcium Carbonate (CaCO3)
mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral
Calcite on Limestone (or Fossil)
Calcium Carbonate (CaCO3)
sedimentary
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Synthetic (glass)
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Limestone Cobble
Sedimentary Limestone (Calcium Carbonate, CaCO3)
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
sedimentary
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone with Lichen/Moss
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone (Crinoidal)
Calcite-bearing bioclastic packstone (CaCO3)
sedimentary
Limestone
Calcium carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Anthropogenic Mineral Mimic
Dyed Agate
Agate (Cryptocrystalline Quartz), SiO2
Mineral
Amber
Succinite (Fossilized Tree Resin)
mineral
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Gray Limestone Fragment
Limestone (CaCO3)
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
sedimentary
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Goldstone
Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)
man-made glass
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone (Coral Fossil)
Scleractinian Coral in Calcium Carbonate (CaCO3)
sedimentary
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Peacock Ore (Chalcopyrite)
Chalcopyrite (CuFeS2)
mineral