Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Category
Mineralogical Simulant
Browse mineralogical simulant specimens identified by the Rock Identifier community.
Learn about Mineralogical Simulant in the encyclopedia
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Precious Opal
Hydrated Silica (SiO2·nH2O)
mineral
Limonite/Ironstone
Limonite (FeO(OH)·nH2O)
mineral
Amber
Succinite (organic mineraloid); Chemical formula: C10H16O
mineral
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
mineral
Red Dyed Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
mineraloid
Opalite Egg
Synthetic Glass (Simulated Opal)
mineral
Opalite
Man-made opalescent glass
gemstone
Dyed Howlite (often sold as 'Turquenite')
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Citrine (Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
mineral
Opal (Precious Opal)
Hydrated Silica (SiO2·nH2O)
mineral
Shungite
Shungite (carbon-rich Precambrian mineraloid)
mineral
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Opalite
Synthetic Opalised Glass
mineral
Opalite
Man-made Glass (Synthetic Opalized Glass)
gemstone
Tumbled Mixed Gemstones (Quartz and Rutile)
Silicon Dioxide (SiO2) with various inclusions
mineral
Fursuit (Synthetic Fur Specimen)
Canis anthropomorphus syntheticus
Anthropomorphic Textile Construct
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
mineral
Amber with Inclusion
Succiniferous fossil resin (C10H16O)
mineraloid
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Wood Paneling
Engineered Wood / Plywood Paneling
not a rock
Tektite (likely Australite)
Tektite (no specific chemical formula as it's a natural glass of variable composition, mostly SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O, TiO2)
Mineral (specifically a mineraloid)
Mahogany Obsidian
Volcanic glass (high silica) with inclusions of Magnetite or Hematite
igneous
Obsidian
Volcanic glass (SiO2 + impurities)
igneous
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Magnesite or Howlite with Matrix
Magnesium carbonate (MgCO3) or Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Mineral
Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Fulgurite
Fulgurite (Lechatelierite)
metamorphic
Black Obsidian
Volcanic Glass (SiO2 + impurities)
Igneous
Gold Sheen Obsidian
Volcanic Glass (SiO2 + Fe3O4 / Gas Inclusions)
igneous
Obsidian
Volcanic glass
igneous
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
mineral
White Opal
Hydrated Silica (SiO2·nH2O)
mineral
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Obsidian
Volcanic Glass (SiO2 rich)
igneous
Fulgurite
Fulgurite (Lechatelierite-rich fused silica)
mineraloid / sedimentary (secondary formation)