Rock Identifier

Category

Mineraloid (Synthetic)

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

Learn about Mineraloid (Synthetic) in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Shungite

Zincite

Opalite

Lead Feldspar

Zircon

White Beryl

Green Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Green Opal

Hydrated Silica (SiO2·nH2O)

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Obsidian (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian

Volcanic Glass (70% or more SiO2)

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with impurities)) — Igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Amber in Matrix (Succinite (Carbon-based organic polymer)) — Organic (Sedimentary context)

Amber in Matrix

Succinite (Carbon-based organic polymer)

Organic (Sedimentary context)

Obsidian (Obsidian (Amorphous volcanic glass, predominantly SiO2)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass, predominantly SiO2)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with impurities)) — igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Red faceted gemstone, possibly synthetic ruby or red glass (Unidentified red gem; ruby is corundum (Al₂O₃), while glass is amorphous silicate) — gemstone

Red faceted gemstone, possibly synthetic ruby or red glass

Unidentified red gem; ruby is corundum (Al₂O₃), while glass is amorphous silicate

Opalite (Synthetic glass / Simulated opal) — gemstone

Opalite

Synthetic glass / Simulated opal

Opalite (Synthetic glass (Opalite simulant)) — gemstone

Opalite

Synthetic glass (Opalite simulant)

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Diamond (or Diamond Simulant) (C (Carbon) or synthetic equivalent) — gemstone

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Opalite (Synthetic glass / Opalized glass) — gemstone

Opalite

Synthetic glass / Opalized glass

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Opalite Egg (Synthetic Glass (Simulated Opal)) — mineral

Opalite Egg

Synthetic Glass (Simulated Opal)

Opalite (Synthetic Glass (SiO2 + impurities)) — mineral

Opalite

Synthetic Glass (SiO2 + impurities)

Opalite (Synthetic Silicon Dioxide (SiO2)) — mineral

Opalite

Synthetic Silicon Dioxide (SiO2)

Blue cabochon gemstone, likely blue sapphire (Corundum (Al₂O₃), colored blue by trace iron and titanium) — gemstone

Blue cabochon gemstone, likely blue sapphire

Corundum (Al₂O₃), colored blue by trace iron and titanium

Faceted colored gemstones, likely synthetic corundum or glass imitations (Not identifiable from the image; possible synthetic corundum (Al₂O₃)) — gemstone

Faceted colored gemstones, likely synthetic corundum or glass imitations

Not identifiable from the image; possible synthetic corundum (Al₂O₃)

Faceted yellow gemstone (possibly citrine or synthetic glass) (Undetermined; citrine is yellow quartz (SiO₂), but the image cannot confirm the material) — gemstone

Faceted yellow gemstone (possibly citrine or synthetic glass)

Undetermined; citrine is yellow quartz (SiO₂), but the image cannot confirm the material

Sapphire (Corundum (Al2O3)) — gemstone

Sapphire

Corundum (Al2O3)

Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Precious Opal

Hydrated Silica (SiO2·nH2O)

Limonite/Ironstone (Limonite (FeO(OH)·nH2O)) — mineral

Limonite/Ironstone

Limonite (FeO(OH)·nH2O)

Blue-green faceted pendant stone (Undetermined; possibly synthetic glass or a blue-green gemstone such as topaz or quartz) — gemstone

Blue-green faceted pendant stone

Undetermined; possibly synthetic glass or a blue-green gemstone such as topaz or quartz

Opalite (Man-made glass (traditionally simulated Opal)) — mineral

Opalite

Man-made glass (traditionally simulated Opal)

Emerald (Beryl (Be₃Al₂Si₆O₁₈), colored green by chromium and/or vanadium) — gemstone

Emerald

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

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

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Opalite (Synthetic glass / Opaque silicious glass) — gemstone

Opalite

Synthetic glass / Opaque silicious glass

Blue Goldstone (Man-made glass with crystalline copper/cobalt inclusions) — mineral

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Note on Image Identification: Textile (N/A (Anthropogenic material)) — not a rock

Note on Image Identification: Textile

N/A (Anthropogenic material)

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

Goldstone

Aventurine Glass (Man-made)

Green gemstone ring (likely synthetic or imitation emerald) (Possibly emerald, beryl (Be₃Al₂Si₆O₁₈); the photo cannot confirm the center stone’s identity or whether it is natural.) — gemstone

Green gemstone ring (likely synthetic or imitation emerald)

Possibly emerald, beryl (Be₃Al₂Si₆O₁₈); the photo cannot confirm the center stone’s identity or whether it is natural.

Black Obsidian (Obsidian (Volcanic Glass, SiO2 + impurity)) — igneous

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurity)

Limonite (Iron Ore) (Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Likely obsidian (possibly tektite or slag glass) (Volcanic glass; primarily SiO₂, noncrystalline) — igneous

Likely obsidian (possibly tektite or slag glass)

Volcanic glass; primarily SiO₂, noncrystalline

Obsidian (Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)) — Igneous

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Jet (Lignite (Anthracite-grade compact coal)) — sedimentary

Jet

Lignite (Anthracite-grade compact coal)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)