Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
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.
Learn about Man Made Byproduct (Often Mistaken For Obsidian Or Emerald) in the encyclopedia
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Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Alexandrite
Chrysoberyl (BeAl2O4)
mineral
Asphalt Conglomerate
Artificial Bituminous Conglomerate
sedimentary
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian
Obsidian (principally SiO2 + MgO, Fe3O4)
igneous
Amethyst
Silicon dioxide (SiO2) containing traces of iron and manganese
mineral
Quartz
Quartz (SiO₂)
mineral
Black obsidian (probable)
Volcanic glass; primarily SiO₂-rich rhyolitic composition
igneous
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Synthetic (Ceramic)
Rough Emerald
Beryl (Be3Al2(SiO3)6 with Chromium/Vanadium impurities)
mineral
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Titanium Aura Quartz
Titanium bonded Silicon Dioxide (SiO2 + Ti)
mineral
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Anthropogenic (Man-made)
Obsidian
Obsidian (Volcanic glass, primarily SiO2)
igneous
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Mineral equivalent / Metal Alloy
Slag (Industrial Byproduct)
Anthropogenic Vitreous Silicate material
igneous
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Diamond
Diamond (pure Carbon, C)
mineral
Obsidian
Volcanic Glass (Amorphous SiO2-rich glass)
Igneous
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Concrete Fragment
Hardened Portland cement and mineral aggregate
sedimentary (anthropogenic)
Obsidian
Obsidian (principally SiO2 with MgO and Fe3O4)
igneous
Peridot
Olivine (specific variety: gem-quality forsterite), (Mg,Fe)2SiO4
Mineral
Tumbled black stone, likely obsidian
Obsidian (natural volcanic glass; mainly silica-rich rhyolitic composition)
igneous
Diamond
Carbon (C)
gemstone
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Sea Glass (specifically Frosted White)
Amorphous Silica (substance: Sodium-calcium silicate glass)
Mineraloid (Anthropogenic/Man-made rock)
Granite Pegmatite
Granitic Pegmatite (composition: SiO2 with KAlSi3O8)
igneous
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Sedimentary-like (Industrial Composite)
Obsidian
Volcanic Glass (SiO2 - Silicon Dioxide with impurities)
Igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)
gemstone
Chalk
Carbonate rock (mainly CaCO3)
sedimentary
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Obsidian
Volcanic glass
igneous