Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Category
Mineraloid (Synthetic)
Browse mineraloid (synthetic) specimens identified by the Rock Identifier community.
Learn about Mineraloid (Synthetic) in the encyclopedia
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Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Synthetic material (Not a rock or mineral)
Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)
BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel
mineral
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial dyes
mineral
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Note: The image provided is a fabric sock, not a geological specimen.
Polyester-Cotton Blend with Elastane
Synthetic/Natural Fiber (Non-Geological)
Diamond (or Cubic Zirconia)
Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ
mineral
Clear quartz crystal sphere
Quartz (silicon dioxide, SiO₂)
mineral
Blue Sapphire
Corundum (Al2O3)
gemstone
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Precious Opal
SiO2·nH2O (Hydrated Silicon Dioxide)
mineraloid
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Limonite (Ironstone)
Limonite (mixture of hydrated iron(III) oxide-hydroxides)
mineral
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Cubic Zirconia (as a jewelry specimen)
Zirconium dioxide (ZrO2)
mineral
Ametrine
SiO2 (Silicon Dioxide with iron impurities)
gemstone
Mahogany Obsidian
Volcanic Glass with Hematite (SiO2 + Fe2O3)
igneous
Black Obsidian
Volcanic Glass (SiO2 + impurities like Fe3O4)
igneous
Opal
Hydrated silica (SiO2 "NH2O)
mineraloid
Snowflake Obsidian
Spherulitic Obsidian (Volcanic Glass with Cristobalite inclusions)
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Snowflake Obsidian
Hydrated Volcanic Glass (primarily SiO2) with Cristobalite inclusions
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Amber
Amber (C10H16O)
mineral
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Moissanite
Silicon Carbide (SiC)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Sapphire (likely lab-grown or treated)
Corundum (Aluminum Oxide, Al2O3)
gemstone
Pink/red faceted gemstone, likely synthetic ruby or pink sapphire
Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material
gemstone
Amber with Inclusion
Succiniferous fossil resin (C10H16O)
mineraloid
Black Pearl (Tahitian Pearl)
Aragonite / Calcite (CaCO3) with Conchiolin
mineral
Faceted Diamond or Cubic Zirconia
Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ
mineral
Blue Quartz / Glass Gemstone Pendant
SiO2 (Silicon Dioxide) or Synthetic Glass
gemstone
Diamond (or Cubic Zirconia simulant)
C (Carbon) or ZrO2 (Zirconium Dioxide)
gemstone
Orgonite Pyramid (containing Amethyst and mixed minerals)
Silicon Dioxide (SiO2) in synthetic resin
gemstone
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Diamond or Cubic Zirconia
Carbon (diamond) or Zirconium dioxide (cubic zirconia)
gemstone
Strawberry Quartz (Hematoid Quartz)
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
mineral
Emerald
Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities
gemstone