Mineral (Primary Constituent)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Lapis Lazuli

Lapis lazuli (complex rock composed of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)

Sunstone

Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8

Iron-stained Quartz

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Petrified Wood

Silicified wood (Quartz, SiO2)

Sodalite-rich Syenite (Yooperlite)

Sodalite-rich Syenite (Na8(Al6Si6O24)Cl2 within an igneous matrix)

Green Aura Quartz

Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)

Quartz Druze (on Matrix)

Silicon Dioxide (SiO2)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Iron Oxide or Chlorite

Desert Rose (Baryte or Selenite variant)

Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions

Granite (with Beryl/Aquamarine)

Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)

Gossan (Iron Hat)

Limonitic Gossan (Fe-oxide/hydroxide complex)

Limonite after Pyrite (Prophecy Stone)

Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)

Chrysoberyl (Cyclic Twin)

Beryllium Aluminum Oxide (BeAl2O4)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

African Turquoise

Teal Jasper (Macro-crystalline Quartz/Sio2 + Inclusions of Copper, Iron, and Manganese)

Celestite Geode

Celestine (Strontium Sulfate, SrSO4)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Amygdaloidal Basalt with Epidote

Amygdaloidal Basalt (Mafic volcanic rock)

Larimar (Pectolite)

NaCa2Si3O8(OH)

Labradorite

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

Moldavite

Tektite (Amorphous Silica, SiO2 + Al2O3)

Rhodochrosite

Manganese Carbonate (MnCO3)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Moonstone

Orthoclase Feldspar (composed of alternate layers of orthoclase and albite), (K,Na)AlSi3O8

Prehnite

Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Rhodochrosite

Manganese Carbonate (MnCO3)

Eudialyte in Matrix

Eudialyte [Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2]

Aquamarine with Quartz

Beryl (Be3Al2Si6O18) with Quartz (SiO2)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Black Opal

Amorphous Hydrated Silica (SiO2·nH2O)

Amazonite

Potassium Feldspar (Microcline) - K(AlSi3O8)

Smoky Quartz

Quartz (Silicon Dioxide), Formula: SiO2

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2) with various iron-oxide inclusions

Emerald in Schist (Raw/Tumbled)

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities in Mica Schist

Strawberry Quartz

Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)