Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Category
Synthetic Polymer (Polylactic Acid)
Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.
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Chalk (Sedimentary Limestone)
Calcium Carbonate (CaCO3) - Bioclastic Limestone
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Travertine
Travertine (CaCO3 - Calcium Carbonate)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Eudialyte
Na15Ca6Fe3Zr3Si26O72(OH,Cl)2 (Eudialyte Group)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Granite
Phaneritic Acidic Igneous Rock (Granite Group)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Amber
Succinite
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite in Matrix (Commonly called Fool's Gold)
Iron Sulfide (FeS2)
mineral
Quartz / Calcite Vein Rock
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Fluorite (Purple/Blue variety)
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Fluorite (Green)
Calcium Fluoride (CaF2)
mineral
Pyrite (on Quartz/Sulfide matrix)
Iron Sulfide (FeS2)
mineral
Pyrite (on the right) and Magnetite or Hematite (on the left)
Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Fluorite (Rainbow or Multi-colored Fluorite)
Fluorite (Calcium Fluoride - CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Chrysocolla and Azurite on Matrix
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla) and Copper carbonate hydroxide Cu3(CO3)2(OH)2 (Azurite)
mineral