Mahogany Obsidian
Volcanic glass (SiO2 with Hematite/Magnetite inclusions)
igneous
Category
Man Made Mineral Simulant (Glass)
Browse man made mineral simulant (glass) specimens identified by the Rock Identifier community.
Learn about Man Made Mineral Simulant (Glass) in the encyclopedia
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Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Sandstone
Arenite
sedimentary
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Chert (Common Variety, Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Graphite
Graphite (Carbon, C)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Emerald
Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.
Mineral
Diamond
Diamond (C)
Mineral
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Red Sandstone
Arenite (Iron-rich)
sedimentary
Diamond (Cluster Ring)
Carbon (C)
mineral
Flower Agate
Chalcedony (SiO2) with inclusions
mineral
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (varietal Flint)
Microcrystalline quartz (SiO2)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Red Chert (Jasper)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Granodiorite
Intrusive Igneous Rock
igneous
Jade (Nephrite or Jadeite)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)
Metamorphic Rock / Mineral
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)
Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)
metamorphic
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2
mineral
Chert
Microcrystalline quartz (SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Chert / Flint
Cryptocrystalline quartz (SiO2)
sedimentary
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Chalcedony (Common Opal or Agate variant)
Silicon dioxide (SiO2) with trace hydration
mineral
Diamond
Diamond (Pure Carbon, C)
mineral
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Aura Quartz (Anomalously Coated Quartz)
Silicon Dioxide (SiO2) treated with vaporized metals
mineral