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