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

Fluorite (Rainbow Fluorite Point)

Calcium Fluoride (CaF2)

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

Green Fluorite

Calcium Fluoride (CaF2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral
Pyrite (on Quartz/Host Rock) (Iron Sulfide (FeS₂)) — mineral

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

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

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral
White Topaz (Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2) — mineral

White Topaz

Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2

mineral
Turquoise (Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O

mineral
Turquoise (Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

mineral
Turquoise (Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)) — mineral

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

mineral
Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — Mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Mineral
Azurite-Malachite (often called Azerite Malachite or Azurmalachite) (Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)) — Mineral

Azurite-Malachite (often called Azerite Malachite or Azurmalachite)

Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)

Mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

igneous
Granite (Phaneritic Plutonic Rock (Granite)) — igneous

Granite

Phaneritic Plutonic Rock (Granite)

igneous
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx') (Calcite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

sedimentary
Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

mineral
River Quartz Pitting / Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

River Quartz Pitting / Quartzite Pebble

Quartzite (primarily SiO2)

metamorphic
Peacock Ore (Bornite/Chalcopyrite) (Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)) — mineral

Peacock Ore (Bornite/Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)

mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Baltic Amber (Butterscotch or Egg Yolk Variety) (Fossilized Tree Resin (Succinite); Approximate formula: C10H16O) — Organic Gemstone (Succinite)

Baltic Amber (Butterscotch or Egg Yolk Variety)

Fossilized Tree Resin (Succinite); Approximate formula: C10H16O

Organic Gemstone (Succinite)
Quartzite (River Cobble) (Quartzite (SiO2)) — metamorphic

Quartzite (River Cobble)

Quartzite (SiO2)

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

Yellow Calcite

Calcium Carbonate (CaCO3)

Mineral
Yellow Banded Agate (Silicon Dioxide (SiO₂)) — mineral

Yellow Banded Agate

Silicon Dioxide (SiO₂)

mineral
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Green Calcite

Calcium Carbonate (CaCO3)

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

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Common Marble (Calcium Carbonate (CaCO3)) — metamorphic

Common Marble

Calcium Carbonate (CaCO3)

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

Yellow Calcite

Calcium Carbonate (CaCO3)

mineral
Polygenetic Conglomerate (Puddingstone) (Conglomerate (SiO2 matrix with mixed clasts)) — sedimentary

Polygenetic Conglomerate (Puddingstone)

Conglomerate (SiO2 matrix with mixed clasts)

sedimentary
Oolite (Ooids) (Oolitic Limestone (Principal mineral: Calcite, CaCO3)) — sedimentary

Oolite (Ooids)

Oolitic Limestone (Principal mineral: Calcite, CaCO3)

sedimentary
Epidote-bearing Granite (Unakite-like) (Epidotized Granite) — igneous

Epidote-bearing Granite (Unakite-like)

Epidotized Granite

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

Quartzite Pebble

Quartzite (primarily SiO2)

metamorphic
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Marble (Recrystallized Calcite (CaCO3) Rock) — metamorphic

Marble

Recrystallized Calcite (CaCO3) Rock

metamorphic
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Orange Calcite

Calcium Carbonate (CaCO3)

mineral