Rock Identifier

Category

Synthetic (Not A Natural Rock)

Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.

Learn about Synthetic (Not A Natural Rock) in the encyclopedia

Asphalt Rock

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Chalk

Zircon

Obsidian

Kimberlite

Emerald in Matrix

Emerald in Matrix

Tripolite

Guano

Halite

Aquamarine Matrix

Aquamarine Matrix

Rock Salt

Diamond (likely rough or included fragment) (Diamond, crystalline carbon (C), cubic crystal system) — gemstone

Diamond (likely rough or included fragment)

Diamond, crystalline carbon (C), cubic crystal system

Diamond (Carbon (C), Native Element) — mineral

Diamond

Carbon (C), Native Element

Botryoidal hematite (specular hematite) (Hematite, Fe₂O₃) — mineral

Botryoidal hematite (specular hematite)

Hematite, Fe₂O₃

Goldstone (Aventurine Glass (SiO2 + Cu small inclusions)) — man-made glass mineral simulant

Goldstone

Aventurine Glass (SiO2 + Cu small inclusions)

man-made glass mineral simulant

Blue Topaz (Topaz [Al2SiO4(F,OH)2]) — mineral

Blue Topaz

Topaz [Al2SiO4(F,OH)2]

Polished pink quartz cabochon (Quartz (SiO₂), likely rose quartz or included quartz) — gemstone

Polished pink quartz cabochon

Quartz (SiO₂), likely rose quartz or included quartz

Honey-colored amber (Amber (fossilized plant resin; chiefly polymerized terpenoid compounds)) — gemstone

Honey-colored amber

Amber (fossilized plant resin; chiefly polymerized terpenoid compounds)

Chalcanthite (Copper(II) sulfate pentahydrate (CuSO4·5H2O)) — mineral

Chalcanthite

Copper(II) sulfate pentahydrate (CuSO4·5H2O)

Blue chalcedony cabochon (probable) (Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)) — gemstone

Blue chalcedony cabochon (probable)

Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)

Turquoise cabochon jewelry (Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O) — gemstone

Turquoise cabochon jewelry

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

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

Likely amethyst cabochon ring (Quartz, SiO₂; purple coloration from trace iron and irradiation) — gemstone

Likely amethyst cabochon ring

Quartz, SiO₂; purple coloration from trace iron and irradiation

Yellow faceted gemstone, likely citrine or synthetic glass (Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph) — gemstone

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Cut colorless gemstone, likely quartz or glass imitation (Most plausibly rock crystal (clear quartz, SiO₂); synthetic glass cannot be ruled out from the image) — gemstone

Cut colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (clear quartz, SiO₂); synthetic glass cannot be ruled out from the image

Opal cabochon (Opal, hydrated amorphous silica (SiO₂·nH₂O), likely common or Ethiopian precious opal) — gemstone

Opal cabochon

Opal, hydrated amorphous silica (SiO₂·nH₂O), likely common or Ethiopian precious opal

Champagne topaz (likely) (Topaz, Al₂SiO₄(F,OH)₂) — gemstone

Champagne topaz (likely)

Topaz, Al₂SiO₄(F,OH)₂

Goldstone (Avventurina (Man-made Glass with Copper inclusions)) — mineral

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Tumbled opalite (likely man-made glass) (Opalite, a trade name for opalescent glass; not natural opal) — mineral

Tumbled opalite (likely man-made glass)

Opalite, a trade name for opalescent glass; not natural opal

Limonite with Quartz (Hydrated Iron Oxide Hydroxide with Silicon Dioxide (FeO(OH)·nH2O + SiO2)) — mineral

Limonite with Quartz

Hydrated Iron Oxide Hydroxide with Silicon Dioxide (FeO(OH)·nH2O + SiO2)

Limonite / Iron Oxide Concretion (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O) — mineral

Limonite / Iron Oxide Concretion

Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O

Limonite with Quartz (Hydrated Iron Oxide Hydroxide, FeO(OH)·nH₂O with SiO₂) — mineral

Limonite with Quartz

Hydrated Iron Oxide Hydroxide, FeO(OH)·nH₂O with SiO₂

Smoky Quartz (with Druzy/Polished Edge) (Smoky Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz (with Druzy/Polished Edge)

Smoky Quartz (Silicon Dioxide, SiO2)

Emerald (Beryl (Be3Al2(SiO3)6)) — gemstone

Emerald

Beryl (Be3Al2(SiO3)6)

Limonite Concretion / Ironstone (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O) — mineral

Limonite Concretion / Ironstone

Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O

Bismuth crystal (Bismuth (Bi), synthetic laboratory-grown crystal) — mineral

Bismuth crystal

Bismuth (Bi), synthetic laboratory-grown crystal

Faceted yellow gemstone, likely citrine (Citrine (quartz), SiO₂; possibly yellow sapphire or synthetic glass without testing) — gemstone

Faceted yellow gemstone, likely citrine

Citrine (quartz), SiO₂; possibly yellow sapphire or synthetic glass without testing

Smoky Quartz (SiO2 (Silicon Dioxide)) — mineral

Smoky Quartz

SiO2 (Silicon Dioxide)

Ruby (faceted gemstone) (Corundum (Al2O3 with Cr impurities)) — gemstone

Ruby (faceted gemstone)

Corundum (Al2O3 with Cr impurities)

Digital Multimeter (Synthetic Object) (Digital Multimeter (DMM)) — not a rock

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Man-made Slag (Industrial Byproduct) (Anthropogenic Glassy Residue) — not a natural rock

Man-made Slag (Industrial Byproduct)

Anthropogenic Glassy Residue

not a natural rock

Green glassy stone, possibly aventurine or green jade (Unidentifiable from the image; possible quartz-rich aventurine (SiO₂) or jadeite/nephrite) — mineral

Green glassy stone, possibly aventurine or green jade

Unidentifiable from the image; possible quartz-rich aventurine (SiO₂) or jadeite/nephrite

Polished amethyst cabochon (Amethyst, purple quartz (SiO₂)) — gemstone

Polished amethyst cabochon

Amethyst, purple quartz (SiO₂)

Silicon (Element Si) — mineral

Silicon

Element Si

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

Black spinel bead strand

Spinel, magnesium aluminum oxide (MgAl₂O₄)

Clear faceted quartz-like gemstone (Probably rock crystal quartz (SiO₂), though the image may show synthetic glass or cubic zirconia) — gemstone

Clear faceted quartz-like gemstone

Probably rock crystal quartz (SiO₂), though the image may show synthetic glass or cubic zirconia

Diamond (Diamond (C - Pure Carbon)) — gemstone

Diamond

Diamond (C - Pure Carbon)

Blue Sapphire (Corundum (Al2O3) with traces of Iron and Titanium) — mineral

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Black Tourmaline (Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)) — mineral

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Limonite (Yellow Ochre) (Hydrated Iron Oxide (FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Goldstone (Red/Brown) (Aventurine Glass (SiO2 with Copper inclusions)) — Mineral (Man-made glass)

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Mineral (Man-made glass)

Amethyst ring (Amethyst, purple quartz (SiO₂)) — gemstone

Amethyst ring

Amethyst, purple quartz (SiO₂)

Tanzanite earrings (Tanzanite, blue-violet zoisite (Ca₂Al₃(SiO₄)₃(OH))) — gemstone

Tanzanite earrings

Tanzanite, blue-violet zoisite (Ca₂Al₃(SiO₄)₃(OH))