Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Category
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Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Ruby Zoisite
Anyolite (Zoisite with Ruby and Pargasite)
metamorphic
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Blue Dyed Agate
Cryptocrystalline Quartz (SiO2)
mineral
Turquoise (Blue Howlite imitation)
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Lapis Lazuli
Lapis Lazuli (Rock containing Lazurite, Calcite, and Pyrite)
metamorphic
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (70% or more silicon dioxide)
Igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Banded Agate
Silicon Dioxide (SiO2)
mineral
Chalcedony with inclusions (Agate/Quartz)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Lapis Lazuli
Na6Ca2(Al6Si6O24)(SO4,S,Cl,OH)2 (Lazurite-dominated rock)
metamorphic
Amethyst (Quartz)
Silicon Dioxide (SiO2) with Iron impurities
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Obsidian
Volcanic Glass (SiO2 - Silicon Dioxide with impurities)
Igneous
Schist
Schist (metamorphic rock)
metamorphic
Carnelian
Carnelian (a variety of Chalcedony) - SiO2
mineral
Chert (Jasper transition)
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst Quartz (Amethyst Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Carnelian
Carnelian (Microcrystalline Quartz, SiO2)
Mineral
Sapphire
Corundum (Al2O3)
gemstone
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Travertine
Tufa limestone (CaCO3)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Red Jasper
Silicon Dioxide (SiO2) containing Iron Oxide inclusions
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Rough Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Tourmaline (Mixed colors)
Boron silicate mineral (Na,Ca)(Li,Mg,Al,Fe,Mn,Ti,V,Cr)3Al6(BO3)3Si6O18(OH,F)4
mineral
Green Aventurine
Silicon dioxide (SiO2) with Fuchsite inclusions
metamorphic
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Iron Oxide
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Schist (Micaceous Schist)
Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)
metamorphic
Dalmatian Stone
Peralkaline Quartz-Feldspar Rock
igneous
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Phyllite
Phyllite (Intermediate grade metamorphic rock)
metamorphic