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

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Fossiliferous Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Limestone (specifically Iron-stained or Argillaceous Limestone) (Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities) — sedimentary

Limestone (specifically Iron-stained or Argillaceous Limestone)

Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartzite (Quartzite (mostly SiO2)) — Metamorphic

Quartzite

Quartzite (mostly SiO2)

Fossilized Shell in Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossilized Shell in Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Pink Aragonite (CaCO3) — mineral

Pink Aragonite

CaCO3

Caribbean Calcite (Calcite and Aragonite (CaCO3)) — mineral

Caribbean Calcite

Calcite and Aragonite (CaCO3)

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

Malachite

Copper carbonate hydroxide Cu2CO3(OH)2

River Stone (Quartzite Pebble) (Metamorphosed Quartz-rich Sandstone (SiO2)) — metamorphic

River Stone (Quartzite Pebble)

Metamorphosed Quartz-rich Sandstone (SiO2)

Granite (Phaneritic plutonic rock (SiO2 rich)) — igneous

Granite

Phaneritic plutonic rock (SiO2 rich)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Banded Calcite (Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Mixed Mineral and Fossil Collection (Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)) — mineral

Mixed Mineral and Fossil Collection

Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)

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

Quartzite

Metamorphic rock predominantly composed of Quartz (SiO2)

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

Orange Calcite (Banded Calcite)

Calcite (Calcium Carbonate, CaCO3)

Limestone with Lichen (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Lichen

Sedimentary Calcium Carbonate (CaCO3)

Dalmatian Jasper (Peralkaline rhyolite with Arfvedsonite inclusions) — igneous

Dalmatian Jasper

Peralkaline rhyolite with Arfvedsonite inclusions

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Quartzite Cobble (Quartzite (chemically SiO2)) — metamorphic

Quartzite Cobble

Quartzite (chemically SiO2)

Travertine (Terrestrial Sedimentary Limestone (CaCO3)) — sedimentary

Travertine

Terrestrial Sedimentary Limestone (CaCO3)

Carrara Marble (Metamorphosed Limestone) — metamorphic

Carrara Marble

Metamorphosed Limestone

Limestone Fragment (Sedimentary rock (primarily Calcium Carbonate, CaCO3)) — sedimentary

Limestone Fragment

Sedimentary rock (primarily Calcium Carbonate, CaCO3)

Quartzite Pebble (Quartzite (Silicon Dioxide: SiO2)) — metamorphic

Quartzite Pebble

Quartzite (Silicon Dioxide: SiO2)

Fossiliferous Limestone (Carbonate Rock (CaCO3 with organic inclusions)) — sedimentary

Fossiliferous Limestone

Carbonate Rock (CaCO3 with organic inclusions)

Quartz Geode (Water-worn) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Water-worn)

Silicon Dioxide (SiO2)

Caribbean Calcite (Aragonite and Calcite (CaCO3)) — mineral

Caribbean Calcite

Aragonite and Calcite (CaCO3)

Crushed Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

Aquamarine (Aquamarine (Beryl variety); Be3Al2Si6O18) — mineral

Aquamarine

Aquamarine (Beryl variety); Be3Al2Si6O18

Peacock Ore (Chalcopyrite with acid treatment) (Copper Iron Sulfide (CuFeS2)) — mineral

Peacock Ore (Chalcopyrite with acid treatment)

Copper Iron Sulfide (CuFeS2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Peacock Ore (Bornite or Chalcopyrite treated with acid) (Bornite (Cu5FeS4) or Acid-washed Chalcopyrite (CuFeS2)) — mineral

Peacock Ore (Bornite or Chalcopyrite treated with acid)

Bornite (Cu5FeS4) or Acid-washed Chalcopyrite (CuFeS2)

Peacock Ore (Bornite or Chalcopyrite) (Bornite (Cu5FeS4) or Acid-Washed Chalcopyrite (CuFeS2)) — mineral

Peacock Ore (Bornite or Chalcopyrite)

Bornite (Cu5FeS4) or Acid-Washed Chalcopyrite (CuFeS2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Limestone (River Stone) (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Limestone (River Stone)

Limestone (Calcium Carbonate, CaCO3)

Peacock Ore (Bornite (Cu5FeS4) or Chalcopyrite treated with acid) — mineral

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid