Peacock Ore
Bornite (Cu5FeS4) or Chalcopyrite treated with acid
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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Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite Concretion
Iron Sulfide (FeS2) in Sedimentary Matrix
sedimentary
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Metamorphosed Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Granite Cobble
Granite (Phaneritic Igneous Rock)
igneous
Limestone (specifically Carboniferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone (River or Sea Cobble)
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Banded Calcite (Honey Calcite)
Calcium Carbonate (CaCO3)
mineral
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))
mineral
Marble
Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Amber
Succinate (Succinite for Baltic varieties)
mineraloid
Amethyst (Purple), Sulfur (Yellow), and Blue Apatite
SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)
mineral
Amber
Succinates (Fossilized Tree Resin)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Fluorite (Fluorescent)
Calcium Fluoride (CaF2)
mineral
Marble (Calcitic)
Metamorphosed Limestone (CaCO3)
metamorphic
Pink Granite
Granite (Phaneritic Acidic Igneous)
igneous
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Quartzite (River Stone)
SiO2 (Silicon Dioxide)
metamorphic
Quartzite Cobble
Meta-quartzite
metamorphic
Travertine
Calcium Carbonate (CaCO3)
sedimentary
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite Pebbles
Metamorphosed sandstone (SiO2)
metamorphic