Chert (Jasper-like Silicate)
Microcrystalline quartz (SiO2)
sedimentary
Category
Mineral And Organic Gemstone
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Red Jasper
SiO2 (Silicon Dioxide with Iron Oxide impurities)
sedimentary
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Basalt with Peridotite Xenolith
Mafic Igneous Rock with Peridotite Inclusion (Olivine-rich)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Chert with Druzy Quartz Geode
Microcrystalline Quartz (SiO2)
sedimentary
Opal
Hydrated amorphous form of silica (SiO2·nH2O)
mineral
Shale
Shale
sedimentary
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Bronzite
Enstatite (var. Bronzite), (Mg,Fe)SiO3
mineral
Chert (specifically Gray/Black Chert)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
sedimentary
Aquamarine (Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Sunstone (Feldspar)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with inclusions of Hematite/Goethite
mineral
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Citrine (Yellow Quartz)
Silicon Dioxide (SiO2)
Mineral
Blue Lace Agate
Chalcedony (SiO2) with trace minerals
mineral
Amazonite
Amazonite (KAlSi3O8, a triclinic variety of Potassium Feldspar)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz with Matrix
Quartz (Silicon Dioxide, SiO2)
mineral
Kunzite (variety of Spodumene)
Lithium Aluminum Silicate (LiAlSi2O6)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Carnelian
Carnelian (a variety of Chalcedony) - SiO2
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Quartz (specifically Citrine or Yellow Quartz)
Silicon Dioxide (SiO2)
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Amazonite
Microcline (KAlSi3O8) with trace lead
mineral
Amazonite (with smoky quartz/red jasper inclusions)
Tectosilicate - Microcline Feldspar (KAlSi3O8)
Mineral
Green Quartz (Prasiolite/Adventurine/Jasper)
Silicon Dioxide (SiO2)
mineral
Green Tourmaline
Verdelite (Silicate mineral); Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Beryl (likely var. Aquamarine or Goshenite) in Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Amethyst
Amethyst (SiO2 - Silicon Dioxide with iron impurities)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral