Rock Identifier

Category

Synthetic Polymer (Synthetic Material)

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

Learn about Synthetic Polymer (Synthetic Material) in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Opalite

Lead Feldspar

Peat

Zircon

Dunite

Limonite

Shell Opal

Madagascar Opal

Lavender Obsidian

Electric Blue Obsidian

Likely bismuth crystal (Synthetic bismuth (Bi), crystallized from molten metal; not a natural rock-forming specimen) — mineral

Likely bismuth crystal

Synthetic bismuth (Bi), crystallized from molten metal; not a natural rock-forming specimen

Diamond (or Cubic Zirconia simulant) (Carbon (C) / Zirconium Dioxide (ZrO2)) — gemstone

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium Dioxide (ZrO2)

Emerald (Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities) — gemstone

Emerald

Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities

Strawberry Quartz (Hematoid Quartz) (Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)) — mineral

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Blue Goldstone (Aventurine Glass) — Man-made mineral simulant (Glass)

Blue Goldstone

Aventurine Glass

Man-made mineral simulant (Glass)

Colorless Gemstone (possibly Diamond or Cubic Zirconia) (C (Diamond) or ZrO2 (Cubic Zirconia)) — gemstone

Colorless Gemstone (possibly Diamond or Cubic Zirconia)

C (Diamond) or ZrO2 (Cubic Zirconia)

Black faceted gemstone, likely spinel or black tourmaline (Most plausibly black spinel (MgAl₂O₄); visually similar possibilities include schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) or synthetic glass) — gemstone

Black faceted gemstone, likely spinel or black tourmaline

Most plausibly black spinel (MgAl₂O₄); visually similar possibilities include schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) or synthetic glass

Ruby in matrix (likely ruby-bearing corundum) (Corundum, aluminum oxide (Al₂O₃), chromium-bearing variety) — gemstone

Ruby in matrix (likely ruby-bearing corundum)

Corundum, aluminum oxide (Al₂O₃), chromium-bearing variety

Black spinel bead bracelet (Spinel (magnesium aluminate), MgAl₂O₄) — gemstone

Black spinel bead bracelet

Spinel (magnesium aluminate), MgAl₂O₄

Blue topaz pendant (Topaz (Al₂SiO₄(F,OH)₂), likely treated blue topaz) — gemstone

Blue topaz pendant

Topaz (Al₂SiO₄(F,OH)₂), likely treated blue topaz

Green cabochon gemstone, possibly peridot (Uncertain from the photo; possible gem-quality olivine, (Mg,Fe)₂SiO₄) — gemstone

Green cabochon gemstone, possibly peridot

Uncertain from the photo; possible gem-quality olivine, (Mg,Fe)₂SiO₄

Yellow-orange faceted gemstone, likely citrine or yellow topaz (Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂) — gemstone

Yellow-orange faceted gemstone, likely citrine or yellow topaz

Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂

Goldstone (Man-made glass infused with copper crystals) — mineral

Goldstone

Man-made glass infused with copper crystals

Blue sapphire (faceted gemstone) (Corundum, Al₂O₃; blue color typically from trace iron and titanium) — gemstone

Blue sapphire (faceted gemstone)

Corundum, Al₂O₃; blue color typically from trace iron and titanium

Red corundum (ruby) crystal fragment (Corundum, Al₂O₃; ruby is red corundum colored mainly by chromium) — gemstone

Red corundum (ruby) crystal fragment

Corundum, Al₂O₃; ruby is red corundum colored mainly by chromium

Red Agate (Carnelian) (Silicon Dioxide (SiO2)) — gemstone

Red Agate (Carnelian)

Silicon Dioxide (SiO2)

Carnelian (Carnelian (Cryptocrystalline Quartz, SiO2)) — mineral

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Goldstone (Avventurina (Cu + SiO2 glass)) — mineral

Goldstone

Avventurina (Cu + SiO2 glass)

Ruby (Faceted) (Corundum (Al2O3:Cr)) — gemstone

Ruby (Faceted)

Corundum (Al2O3:Cr)

Diamond (or Cubic Zirconia) (Carbon (C) or Zirconium Dioxide (ZrO2)) — gemstone

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Ruby (Corundum (Al2O3)) — gemstone

Ruby

Corundum (Al2O3)

Silicon Carbide (Carborundum) (Silicon Carbide (SiC)) — mineral

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Opal ring (Precious opal, hydrated amorphous silica (SiO₂·nH₂O), set in a metal ring) — gemstone

Opal ring

Precious opal, hydrated amorphous silica (SiO₂·nH₂O), set in a metal ring

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Purple diamond (rough gem-quality diamond) (Diamond, crystalline carbon (C)) — gemstone

Purple diamond (rough gem-quality diamond)

Diamond, crystalline carbon (C)

Opal cabochon (Hydrated amorphous silica, SiO₂·nH₂O; likely common or synthetic opal) — gemstone

Opal cabochon

Hydrated amorphous silica, SiO₂·nH₂O; likely common or synthetic opal

Black spinel bead strand (Spinel, magnesium aluminum oxide (MgAl₂O₄)) — gemstone

Black spinel bead strand

Spinel, magnesium aluminum oxide (MgAl₂O₄)

Polished green-and-black banded cabochon (likely malachite imitation or dyed agate) (Uncertain; possible malachite (Cu₂CO₃(OH)₂), banded agate (SiO₂), or man-made glass) — gemstone

Polished green-and-black banded cabochon (likely malachite imitation or dyed agate)

Uncertain; possible malachite (Cu₂CO₃(OH)₂), banded agate (SiO₂), or man-made glass

Green Aventurine (Quartz with fuchsite inclusions (SiO2)) — mineral

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Star Ruby (Corundum (Al2O3)) — gemstone

Star Ruby

Corundum (Al2O3)

Lapidary Wax (imitation/wax model) (Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)) — mineral

Lapidary Wax (imitation/wax model)

Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)

Hematite bead bracelet (Hematite (Fe₂O₃), likely polished or magnetically enhanced beads) — mineral

Hematite bead bracelet

Hematite (Fe₂O₃), likely polished or magnetically enhanced beads

Limonite (Iron Ore) (Limonite; FeO(OH)·nH2O) — mineral

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Red-orange cabochon, likely carnelian or glass imitation (Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored) — gemstone

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Cobalt Glass Slug (Man-made Glass) (Amorphous Silica with Cobalt Oxide (SiO2 + CoO)) — mineraloid

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Bismuth (Bismuth (Bi)) — mineral

Bismuth

Bismuth (Bi)

Painted River Rock (Polished fluvial clast with acrylic/synthetic pigment coating) — Sedimentary or Metamorphic (base substrate)

Painted River Rock

Polished fluvial clast with acrylic/synthetic pigment coating

Sedimentary or Metamorphic (base substrate)

Cubic Zirconia (CZ) (Zirconium dioxide (ZrO2)) — mineral

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

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

Diamond (or synthetic simulant)

Cubic C (Carbon)

Opal ring (likely precious opal) (Hydrated amorphous silica, SiO₂·nH₂O; the pictured stone may be natural opal or a lab-created/imitation opal) — gemstone

Opal ring (likely precious opal)

Hydrated amorphous silica, SiO₂·nH₂O; the pictured stone may be natural opal or a lab-created/imitation opal