Rock Identifier

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

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Zincite

Opalite

Opalite

Lead Feldspar

Lead Feldspar

Dolomite

Dolomite

Orange Calcite

Orange Calcite

Zircon

Zircon

Travertine (Terrestrial Sedimentary Limestone (CaCO3)) — sedimentary

Travertine

Terrestrial Sedimentary Limestone (CaCO3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite with Mica (Metamorphic Quartzite (SiO2 + Mica phyllosilicates)) — metamorphic

Quartzite with Mica

Metamorphic Quartzite (SiO2 + Mica phyllosilicates)

Quartzite (or Massive Quartz) (Silicon Dioxide (SiO2)) — metamorphic

Quartzite (or Massive Quartz)

Silicon Dioxide (SiO2)

Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

Quartzite with inclusions (Metamorphic Quartzite (SiO2 with accessory minerals)) — metamorphic

Quartzite with inclusions

Metamorphic Quartzite (SiO2 with accessory minerals)

Chert (Yellow Jasper/Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins (Altered mafic rock or Epidosite) — metamorphic or igneous alteration

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins

Altered mafic rock or Epidosite

metamorphic or igneous alteration

Quartzite (Quartzite (chiefly SiO2)) — metamorphic

Quartzite

Quartzite (chiefly SiO2)

Pebble (likely Limestone or Siltstone) (Lithic fragment (calcareous or siliciclastic)) — sedimentary

Pebble (likely Limestone or Siltstone)

Lithic fragment (calcareous or siliciclastic)

Quartzite Pebble (Metamorphic rock predominantly composed of Quartz (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic rock predominantly composed of Quartz (SiO2)

Rhodochrosite (Manganese carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese carbonate (MnCO3)

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Ferruginous Sandstone (Red Sandstone) (Arenite with Hematite/Limonite cement) — sedimentary

Ferruginous Sandstone (Red Sandstone)

Arenite with Hematite/Limonite cement

Limestone (Weathered Aggregate) (Sedimentary Carbonate Rock (CaCO3)) — sedimentary

Limestone (Weathered Aggregate)

Sedimentary Carbonate Rock (CaCO3)

Quartzite with Hematite staining (Metamorphic Quartzite (SiO2) with Ferruginous Oxides) — metamorphic

Quartzite with Hematite staining

Metamorphic Quartzite (SiO2) with Ferruginous Oxides

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Aragonite (Aragonite (Carbonate mineral), CaCO3) — mineral

Aragonite

Aragonite (Carbonate mineral), CaCO3

Quartzite Cobble (Quartzite (SiO2)) — metamorphic

Quartzite Cobble

Quartzite (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Calcareous biomicrite / Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Calcareous biomicrite / Calcium Carbonate (CaCO3)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite with Iron Inclusions (Quartzite (primarily SiO2)) — metamorphic

Quartzite with Iron Inclusions

Quartzite (primarily SiO2)

Fossiliferous Limestone (Limestone with fossil inclusions (CaCO3)) — sedimentary

Fossiliferous Limestone

Limestone with fossil inclusions (CaCO3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Limestone (Calcium carbonate (CaCO3)) — sedimentary

Limestone

Calcium carbonate (CaCO3)

Red Quartzite River Stone (Metamorphic Rock (composed mainly of Quartz, SiO2)) — metamorphic

Red Quartzite River Stone

Metamorphic Rock (composed mainly of Quartz, SiO2)

Orange Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Travertine (Tufa) (Chemical Limestone (CaCO3)) — sedimentary

Travertine (Tufa)

Chemical Limestone (CaCO3)

White Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Malachite (Copper carbonate hydroxide [Cu2CO3(OH)2]) — mineral

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Black Mountain Stone (Seiryu Stone) (Limestone with Calcite veins (CaCO3)) — sedimentary

Black Mountain Stone (Seiryu Stone)

Limestone with Calcite veins (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Peridot (Olivine) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Peridot (Olivine)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Quartzite River Rock (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Metamorphic Quartzite (primarily SiO2)