Mineral (Extraterrestrial)

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Sandstone with Liesegang Rings

Clastic Sedimentary Rock with Iron Oxide Precipitates (SiO2 + Fe2O3)

Amethyst (Tumbled)

Silicon Dioxide (SiO2) with iron impurities

Selenite (Satin Spar)

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Labradorite

Labradorite (Ca, Na)(Al, Si)4O8

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Dragon Blood Jasper (Epidote with Piedmontite or Quartz)

Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Chalcanthite (Likely Synthetic/Lab-Grown)

Hydrated copper(II) sulfate (CuSO4·5H2O)

Biotite / Black Mica

K(Mg,Fe)3(AlSi3O10)(F,OH)2

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Ferruginous Quartz

Quartz (Silicon Dioxide) with Iron Inclusion, SiO2

Gold-bearing Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Ocean Jasper

Orbicular Jasper (Silicon Dioxide with impurities), SiO2

Amethyst

Amethyst (Varietal of Quartz), SiO2 with traces of Iron (Fe3+)

Smoky Quartz

Smoky Quartz (SiO2)

Amazonite

Microcline (KAlSi3O8)

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Tiger's Eye

Silicon Dioxide (SiO2) with iron oxide inclusions

Ocean Jasper

Orbicular Jasper/Microcrystalline Quartz (SiO2)

Quartz Geode (Druzy Quartz)

Silicon Dioxide (SiO2)

Larimar

Pectolite (NaCa2Si3O8(OH))

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Lapis Lazuli

Lapis Lazuli (Complex silicate mineral mixture primarily Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Amethyst

Silicon dioxide (SiO2) with iron impurities

Red Jasper

Quartz (Silicon Dioxide) with Hematite inclusions, SiO2

Black Sapphire (Basaltic Blue Sapphire)

Corundum (Al2O3)

Smoky Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Quartz (Milky/Crystal Variety)

Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Precious Opal in Matrix

Hydrated Silica (SiO2·nH2O)

Carnelian Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Moss Agate

Silicon Dioxide with inclusions (SiO2)

Libyan Desert Glass

Tektite (high-silica impact glass), SiO2