Green glassy cabochon, likely dyed or synthetic material
Uncertain; possibly green obsidian, chrysoprase, or synthetic glass
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.
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Prehnite
Prehnite, Ca2Al(AlSi3O10)(OH)2
mineral
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Dendritic Siltstone
Siltstone with Manganese Oxide dendrites (MnO2)
sedimentary
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Emerald In Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Chert
Chert (Microcrystalline Quartz)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Dyed Quartz (imitating Emerald/Green Quartz)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Fuchsite (Green Muscovite in Quartz)
K(Al,Cr)2(AlSi3O10)(OH)2 - Chromium-rich Muscovite
metamorphic
Iron Slag
Iron smelting byproduct (Glassy/vesicular silicate)
anthropogenic / industrial byproduct
Peridot
Olivine ((Mg, Fe)2SiO4)
gemstone
Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
mineral
Peridot
Olivine (Mg, Fe)₂SiO₄
mineral
Concretion in Shale
Siltstone/Shale with Siderite or Calcareous concretions
sedimentary
Obsidian
Obsidian (volcanic glass)
igneous
Emerald
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Siltstone
Siltstone (Detrital Sedimentary Rock)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
sedimentary
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Serpentine
Serpentine subgroup (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Apache Tear (Obsidian)
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Geodude
Geodude (Rock Pokémon: No. 74)
igneous
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Faceted Peach Morganite (Beryl)
Morganite (Be3Al2Si6O18 with trace Manganese)
mineral
Black Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Amethyst (Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Scoria (Basaltic Lava Rock)
Vesicular Basalt
igneous
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral