Emerald
Beryl (Be3Al2(SiO3)6) 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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Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Limestone Concretion (Botryoidal/Calcareous Nodules)
Calcium Carbonate Concretion (CaCO3)
sedimentary
Tiffany Stone
Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)
metamorphic
Ironstone Concretion
Siderite or Hematite Concretion (FeCO3 or Fe2O3)
sedimentary
Obsidian
Obsidian
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Quartzite River Rock with Dendrites
Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions
metamorphic
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Obsidian
Volcanic Glass (predominantly SiO2, approximately 70% or more)
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Blue Dumortierite Quartz
Dumortierite in Quartz (AlAl6BSi3O12(O,OH)3)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
gemstone
Sandstone
Arenite (SiO2 primarily)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Sandstone
Arenite (specifically sublithic or quartz arenite)
sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Quartzite Pebble (Yellow/Cloudy Quartz)
Silicon Dioxide (SiO2) - Recrystallized Sandstone
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Banded Sandstone Peabble
Arenite with iron oxide banding
sedimentary
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
gemstone
Dendritic Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Emerald
Beryl (Be3Al2Si6O18 with chromium and vanadium impurities)
gemstone
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
![Rough Diamond (or Quartz Crystal) (Carbon (C) [if Diamond] / Silicon Dioxide (SiO2) [if Quartz]) — mineral](https://media.rock.id/rough-diamond-or-quartz-crystal-b47280f1-d6ce-4d24-af2e-4d3e8d6ff671-thumbnail.jpg)
Rough Diamond (or Quartz Crystal)
Carbon (C) [if Diamond] / Silicon Dioxide (SiO2) [if Quartz]
mineral
Obsidian
Obsidian (Extrusive Volcanic Glass)
igneous
Howlite
Howlite, Ca₂B₅SiO₉(OH)₅
mineral
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Quartzite Pebble
Quartzite (SiO2 with minor impurities)
metamorphic
Nephrite Jade (or Serpentine)
Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals
Mineral/Rock
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral