Dyed Agate Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Category
Mineraloid Like Synthetic Material
Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.
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Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)
igneous
Ruby
Corundum (Al2O3 with Chromium)
mineral
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Black Obsidian
Obsidian (Volcanic Glass, ~70% SiO2)
igneous
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (70–75% SiO2)
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Obsidian
Obsidian (Extrusive Volcanic Glass)
igneous
Bismuth
Bismuth (Bi)
mineral
Faceted Quartz or Cubic Zirconia
SiO2 (Quartz) or ZrO2 (Cubic Zirconia)
gemstone
Mahogany Obsidian
Volcanic Glass (predominantly SiO2 with inclusions of Hematite or Magnetite)
igneous
Pink Opal
Hydrated Silica (SiO2·nH2O) with Palygorskite inclusions
Mineraloid
Amber
Succinite (a specific common type) or Fossilized Tree Resin (C10H16O)
Mineraloid
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Blue Sapphire
Corundum (Al2O3 with Cr, Fe, and Ti trace elements)
gemstone
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Mahogany Obsidian
Obsidian (Volcanic Glass with Hematite inclusions)
igneous
Pink Dyed Agate
Silicon Dioxide (SiO2) with synthetic pigment
mineral
Common Opal (Potch)
Hydrated Silica (SiO2·nH2O)
mineral
Snowflake Obsidian
Volcanic Glass (SiO2) with Cristobalite inclusions
igneous
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (primarily SiO2)
igneous
Limonite (Ironstone Concretion)
Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)
sedimentary
Iron Slag
Ferrous Slag (Industrial Byproduct)
mineraloid (anthropogenic byproduct)
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Obsidian
Volcanic Glass (SiO2 rich)
Igneous
Lapis Lazuli
Lapis lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Mahogany Obsidian
Volcanic glass (SiO2 + Fe2O3)
igneous
Ruby
Corundum (Al2O3 with Chromium trace)
mineral
Diamond (in jewelry)
Cubic Carbon (C)
mineral
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite/Magnetite inclusions)
igneous
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Pearls (likely freshwater cultured pearls)
Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin
gemstone
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
mineral
Mahogany Obsidian
Volcanic glass containing Magnetite/Hematite
igneous
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions
igneous
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
mineral
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (mostly SiO2)
igneous