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
Green Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

mineral
Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral
Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Fluorite (Rainbow Fluorite) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite (Rainbow Fluorite)

Fluorite (Calcium Fluoride, CaF2)

mineral
Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite

Fluorite (Calcium Fluoride, CaF2)

mineral
Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Amber (Succinite (C10H16O)) — mineraloid

Amber

Succinite (C10H16O)

mineraloid
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Pyrite (Fool's Gold) Cube (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold) Cube

Iron Sulfide (FeS2)

mineral
Pyrite in Shale (Iron Sulfide (FeS2)) — mineral

Pyrite in Shale

Iron Sulfide (FeS2)

mineral
Green Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

mineral
Marble (Metamorphosed Limestone/Dolomite) — metamorphic

Marble

Metamorphosed Limestone/Dolomite

metamorphic
Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Biogenic Inclusions) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Biogenic Inclusions

sedimentary
Rhodochrosite in Quartz (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite in Quartz

Manganese Carbonate (MnCO3)

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

Blue Calcite

Calcium Carbonate (CaCO3)

mineral
Fossiliferous Limestone (Calcite (CaCO3) with Bioclastic inclusions) — sedimentary

Fossiliferous Limestone

Calcite (CaCO3) with Bioclastic inclusions

sedimentary
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Coquina (Fossiliferous Limestone) (Coquina (Organic Clastic Limestone)) — sedimentary

Coquina (Fossiliferous Limestone)

Coquina (Organic Clastic Limestone)

sedimentary
Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

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

Honey Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral
Quartzite River Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Pebble

Quartzite (primarily SiO2)

metamorphic
Limestone (Sedimentary Calcite (CaCO3)) — sedimentary

Limestone

Sedimentary Calcite (CaCO3)

sedimentary
Quartz / Quartzite (Silicon Dioxide (SiO2)) — Mineral / Metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

Mineral / Metamorphic
Banded Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)) — sedimentary

Banded Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)

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

Blue Calcite

Calcium Carbonate (CaCO3)

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

Quartzite

Quartzite (Primary mineral: SiO2)

metamorphic
Amygdaloidal Rhyolite (Amygdaloidal Rhyolite (Felsic volcanic rock)) — igneous

Amygdaloidal Rhyolite

Amygdaloidal Rhyolite (Felsic volcanic rock)

igneous
Coquina (Biogenic Limestone (Calcite, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcite, CaCO3)

sedimentary
Stromatolite (Fossiliferous Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Stromatolite (Fossiliferous Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

sedimentary
Green Calcite (Onyx Marble) (Calcium Carbonate (CaCO3)) — mineral

Green Calcite (Onyx Marble)

Calcium Carbonate (CaCO3)

mineral
Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

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

Orange Calcite

Calcium Carbonate (CaCO3)

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

Honey Calcite (Yellow Calcite)

Calcium Carbonate (CaCO3)

mineral
Dalmatian Stone (Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)) — igneous

Dalmatian Stone

Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)

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

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

mineral
Basalt (Water-worn pebble) (Basalt (Mafic Extrusive Rock)) — igneous

Basalt (Water-worn pebble)

Basalt (Mafic Extrusive Rock)

igneous
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary