Marble (polished)
Recrystallized Calcite (CaCO3)
metamorphic
Category
Synthetic Polymer (Polylactic Acid)
Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.
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Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Quartzite (River Cobble)
Metamorphosed sandstone (SiO2)
metamorphic
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Crushed Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Quartzite
Quartzite (SiO2 with chromium-rich muscovite/fuchsite inclusions)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Calcite
Calcium Carbonate (CaCO3)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Banded Calcite (Mexican Onyx)
Calcite (CaCO3)
mineral
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Limonite-stained Quartz / Quartzite
Silicon Dioxide (SiO2) with iron hydroxides (FeO(OH)·nH2O)
sedimentary or metamorphic
White Marble Pebble
Recrystallized Calcite (CaCO3)
metamorphic
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Aragonite / Calcite Geode
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone (Red Marble)
Bioclastic Limestone (CaCO3)
sedimentary
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Yellow Calcite (Banded Calcite)
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone with Brachiopod shell
Calcium carbonate (CaCO3)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Limestone with Quartz or Calcite Veining
Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions
sedimentary
Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Aragonite
Aragonite (Calcium Carbonate, CaCO3)
mineral
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Peridot (Gem-quality Olivine)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic