Goldstone
Aventurine Glass (Man-made)
mineral
Category
Man Made Byproduct (Often Mistaken For Obsidian Or Emerald)
Browse man made byproduct (often mistaken for obsidian or emerald) specimens identified by the Rock Identifier community.
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Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
sedimentary
Opalite
Synthetic Opalized Glass
gemstone
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
mineral
Aventurine
Silicon dioxide (Quartz) with inclusions (KAl2(AlSi3O10)(OH)2)
mineral
Opalite
Synthetic Opalised Glass
glass
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Anthropogenic material (Man-made sedimentary mimic)
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
mineral
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Industrial byproduct (often mistaken for obsidian or mineral)
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Dioptase
Dioptase (CuSiO2(OH)2)
mineral
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
gemstone
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Polished black stone, likely black obsidian
Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition
igneous
Dioptase
Dioptase (CuSiO3 · H2O)
mineral
Glass Nugget (Tumbled Glass)
Amorphous Silicon Dioxide (SiO2) with additives
mineraloid (man-made)
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Opalite
Synthetic glass / Opalized glass
gemstone
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
Iron Slag
Anthropogenic Iron Silicate
industrial byproduct
Opalite
Synthetic glass (SiO2 + metal additions)
mineraloid
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
igneous
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Ferrochrome Slag
Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)
Industrial byproduct (often confused with igneous rocks or meteorites)
Iron Slag
Anthropogenic Ferro-silicate
mineral
Iron Slag
Anthropogenic pyrometallurgical byproduct
igneous
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone