Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Category
Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.
Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Obsidian
Volcanic Glass (predominantly SiO2, approximately 70% or more)
Goldstone
Avventurina (Cu + SiO2 glass)
Amber
Succinite
Cubic Zirconia
Zirconium dioxide (ZrO2)
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Hematite
Iron(III) oxide (Fe2O3)
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
Black Obsidian
Volcanic Glass (predominantly SiO2, Silicon Dioxide)
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Slag (Industrial Glass)
Artificial Vitreous Silicate
Ceramic or Polished Stone Heart (Anthropogenic Material)
Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Opalite (Man-made Glass)
Synthetic Opalised Glass
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
Parti Sapphire
Corundum (Al2O3)
Slag (Industrial Glass Slag)
Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Obsidian
Volcanic glass
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Ruby (in costume jewelry context)
Corundum (Al2O3) with Chromium impurities
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
Black Obsidian
Volcanic Glass (SiO2 + impurities)
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Diamond
Diamond (C)
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
Amber
Succinite (specifically for Baltic amber; general formula C10H16O)
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
Obsidian
Obsidian (Amorphous volcanic glass, predominantly SiO2)
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)
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Gold Sheen Obsidian
Volcanic Glass (SiO2 + Fe3O4 / Gas Inclusions)
The user-provided image does not contain a rock or mineral specimen
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Ruby (Pink to Red Corundum)
Al2O3 (Corundum with Chromium impurities)
Blue Goldstone
Aventurine Glass (SiO2 with Co and metallic inclusions)
Obsidian
Amorphous volcanic glass (primarily SiO2)
Jade
Jadeite or Nephrite
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)