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

Opalite

Lead Feldspar

Dolomite

Zircon

Orange Calcite

Ammolite (Biogenic gemstone (Aragonite, CaCO3)) — mineral

Ammolite

Biogenic gemstone (Aragonite, CaCO3)

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Diamond (or synthetic simulant) (Cubic C (Carbon)) — mineral

Diamond (or synthetic simulant)

Cubic C (Carbon)

Blue-green tumbled gemstone, likely turquoise or dyed turquoise (Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the blurry image) — gemstone

Blue-green tumbled gemstone, likely turquoise or dyed turquoise

Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the blurry image

Assorted Semi-Precious Gemstone Crosses (Quartz, Silicates, Carbonates (various)) — mineral

Assorted Semi-Precious Gemstone Crosses

Quartz, Silicates, Carbonates (various)

Cubic Zirconia (Zirconium Dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Mother of Pearl (Nacre) (Aragonite (layered with organic polymers), CaCO3) — mineral

Mother of Pearl (Nacre)

Aragonite (layered with organic polymers), CaCO3

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Colorless faceted gemstone, likely cubic zirconia (Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond) — gemstone

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond

Goldstone (Aventurine glass) — mineral (man-made glass)

Goldstone

Aventurine glass

mineral (man-made glass)

Green faceted gemstone, likely emerald (Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium) — gemstone

Green faceted gemstone, likely emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium

Cubic Zirconia (Jewelry Setting) (Cubic Zirconia (ZrO2)) — gemstone

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Cubic Zirconia (Faceted) (Zirconium Dioxide (ZrO2)) — mineral

Cubic Zirconia (Faceted)

Zirconium Dioxide (ZrO2)

Polished tiger’s eye (Quartz (microcrystalline SiO₂) with crocidolite-derived iron oxides) — mineral

Polished tiger’s eye

Quartz (microcrystalline SiO₂) with crocidolite-derived iron oxides

Larimar (Pectolite (NaCa2Si3O8(OH))) — Mineral variant / Gemstone

Larimar

Pectolite (NaCa2Si3O8(OH))

Mineral variant / Gemstone

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Amber (Succinite (Resinite)) — fossil

Amber

Succinite (Resinite)

Amber (Succinite (Fossilized Tree Resin)) — mineraloid

Amber

Succinite (Fossilized Tree Resin)

Amber (Amber (Succinite), fossilized tree resin) — Mineraloid

Amber

Amber (Succinite), fossilized tree resin

Amber (Succinite (with formula approximately C10H16O)) — Organic mineraloid

Amber

Succinite (with formula approximately C10H16O)

Organic mineraloid

Amber (Fossilized Tree Resin (Generic formula: C10H16O)) — mineral

Amber

Fossilized Tree Resin (Generic formula: C10H16O)

Amber (in Matrix/Shale) (Amber (Fossilized Tree Resin)) — mineral

Amber (in Matrix/Shale)

Amber (Fossilized Tree Resin)

Amber (Succinite (approximate formula C10H16O)) — mineraloid

Amber

Succinite (approximate formula C10H16O)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Synthetic Blue Aura Quartz (Silicon Dioxide (SiO2) with Metallic Infusion) — mineral (synthetic/man-made coating)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

mineral (synthetic/man-made coating)

Magnetite or Hematite-rich Ore (Magnetite (Fe3O4) or Hematite (Fe2O3)) — mineral

Magnetite or Hematite-rich Ore

Magnetite (Fe3O4) or Hematite (Fe2O3)

Ruby (Corundum (Al2O3 with Chromium trace impurities)) — mineral

Ruby

Corundum (Al2O3 with Chromium trace impurities)

Blue glassy mineral specimen, possibly blue topaz or aquamarine (Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur) — gemstone

Blue glassy mineral specimen, possibly blue topaz or aquamarine

Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur

Orange Sapphire (Corundum (Al2O3)) — gemstone

Orange Sapphire

Corundum (Al2O3)

Ametrine (Silicon Dioxide (SiO2) with iron impurities) — mineral

Ametrine

Silicon Dioxide (SiO2) with iron impurities

Diamond (or Diamond Simulant) (Carbon (C) or Cubic Zirconia (ZrO2)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Polished amber (Amber (fossilized plant resin), commonly succinite; organic mineraloid rather than a true mineral) — gemstone

Polished amber

Amber (fossilized plant resin), commonly succinite; organic mineraloid rather than a true mineral

Amber (Succinite (Fossilized Tree Resin, C10H16O)) — gemstone

Amber

Succinite (Fossilized Tree Resin, C10H16O)

Amber (Succinite (Fossilized Tree Resin)) — gemstone

Amber

Succinite (Fossilized Tree Resin)

Amber (Copal) (Fossilized Tree Resin (C10H16O)) — mineral

Amber (Copal)

Fossilized Tree Resin (C10H16O)

Amber (Succinite (approximate formula C10H16O)) — mineraloid

Amber

Succinite (approximate formula C10H16O)

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

Amber (Amber (Amorphous Organic Hydrocarbon)) — mineral

Amber

Amber (Amorphous Organic Hydrocarbon)

Amber (Succinite) — Organic mineraloid

Amber

Succinite

Organic mineraloid

Amber (Succinite (a specific high-quality amber from the Baltic)) — Organic Mineraloid

Amber

Succinite (a specific high-quality amber from the Baltic)

Organic Mineraloid

Blue opalite (often sold as synthetic opal) (Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)) — gemstone

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Colorless faceted gemstone, likely cubic zirconia (Cubic zirconia (synthetic ZrO₂), possibly glass or white sapphire) — gemstone

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or white sapphire