Rock Identifier

Category

Synthetic Polymer (Polylactic Acid)

Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Chrysocolla (Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O

mineral
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Calcite (Calcite (CaCO₃)) — Mineral

Calcite

Calcite (CaCO₃)

Mineral
Green Calcite (Calcite (CaCO3)) — mineral

Green Calcite

Calcite (CaCO3)

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

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Fossiliferous Limestone (Red Marble) (Bioclastic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone (Red Marble)

Bioclastic Limestone (CaCO3)

sedimentary
Iceland Spar (Optical Calcite) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Iceland Spar (Optical Calcite)

Calcite (Calcium Carbonate, CaCO3)

mineral
Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

mineral
Fossiliferous Limestone (Bioclastic Limestone (composition: CaCO3)) — sedimentary

Fossiliferous Limestone

Bioclastic Limestone (composition: CaCO3)

sedimentary
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

metamorphic
Coquina (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

sedimentary
Banded Calcite (often sold as Yellow Aragonite or Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (often sold as Yellow Aragonite or Onyx)

Calcium Carbonate (CaCO3)

sedimentary
Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

metamorphic
Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

mineral
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Black Marble (Recrystallized Limestone (CaCO3)) — metamorphic

Black Marble

Recrystallized Limestone (CaCO3)

metamorphic
Carrara Marble (Metamorphosed Limestone (principally Calcium Carbonate, CaCO3)) — metamorphic

Carrara Marble

Metamorphosed Limestone (principally Calcium Carbonate, CaCO3)

metamorphic
Yellow Quartzite (Quartzite (primarily SiO2)) — metamorphic

Yellow Quartzite

Quartzite (primarily SiO2)

metamorphic
Basalt with Calcite Veins (Aphanitic mafic volcanic rock with CaCO3 inclusions) — igneous

Basalt with Calcite Veins

Aphanitic mafic volcanic rock with CaCO3 inclusions

igneous
Limestone (specifically a Crushed Aggregate fragment) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically a Crushed Aggregate fragment)

Calcium Carbonate (CaCO3)

sedimentary
Quartzite (Quartzite (Primary mineral: SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: SiO2)

metamorphic
Oolitic Limestone (Oolite (Sedimentary rock composed of CaCO3)) — sedimentary

Oolitic Limestone

Oolite (Sedimentary rock composed of CaCO3)

sedimentary
Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

mineral
Fossiliferous Limestone (Crinoidal) (Bioclastic Limestone (predominantly CaCO3)) — sedimentary

Fossiliferous Limestone (Crinoidal)

Bioclastic Limestone (predominantly CaCO3)

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

Calcite

Calcite (Calcium Carbonate, CaCO3)

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

Green Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral
Malachite in Matrix (Copper Carbonate Hydroxide (Cu2CO3(OH)2)) — mineral

Malachite in Matrix

Copper Carbonate Hydroxide (Cu2CO3(OH)2)

mineral
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Green Quartzite (Quartzite (SiO2 with chromium-rich muscovite/fuchsite inclusions)) — metamorphic

Green Quartzite

Quartzite (SiO2 with chromium-rich muscovite/fuchsite inclusions)

metamorphic
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Sodalite (Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)) — mineral

Sodalite

Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)

mineral
White Onyx (Marble Onyx) (Calcite (CaCO3) - Banded Calcium Carbonate) — sedimentary

White Onyx (Marble Onyx)

Calcite (CaCO3) - Banded Calcium Carbonate

sedimentary
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Quartzite Cobble (Quartzite (SiO2)) — metamorphic

Quartzite Cobble

Quartzite (SiO2)

metamorphic
Blue Calcite (Calcium Carbonate (CaCO3)) — Mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Mineral
Crushed Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Sedimentary Calcium Carbonate (CaCO3)

sedimentary
Marble (polished) (Recrystallized Calcite (CaCO3)) — metamorphic

Marble (polished)

Recrystallized Calcite (CaCO3)

metamorphic