Mineral

Ruby

Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Quartz (Variety: Rose Quartz/Smoky Quartz mix)

Silicon Dioxide (SiO2)

Pegmatitic Granite

Granite (Alkali-feldspar granite) with Quartz and Orthoclase

Gneiss

High-grade metamorphic rock (Gneiss)

Dragon Vein Agate

Chalcedony (Quartz) - SiO2

Chrysocolla

Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O

Amethyst

Amethyst (Purple Quartz); formula: SiO2 (Silicon Dioxide)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst (Chevron/Dream Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Mookaite Jasper

Silicified radiolarite (SiO2)

Emerald

Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium

Druzy Quartz

Crystalline Silicon Dioxide (SiO2)

Sugilite

KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)

Bloodstone (Heliotrope)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite

Quartz (likely Herkimer Diamond style)

Silicon Dioxide (SiO2)

Amethyst (Faceted)

Amethyst (Silicon Dioxide with iron impurities, SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Chalcedony in Matrix

Silicon Dioxide (SiO2)

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with FeOx inclusions

Aventurine (Green)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Citrine Quartz

Silicon Dioxide (SiO2)

Tiger's Eye (Unpolished)

Pseudomorph of Quartz after Crocidolite (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Basalt with Hematite staining

Extrusive mafic igneous rock with Fe2O3

Mookaite Jasper

Radiolarite (Chert/Jasper variety), formula SiO2

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Cinnabar in Matrix

Cinnabar (Mercury(II) sulfide, HgS)

Amethyst Quartz with Matrix

Silicon Dioxide (SiO2)

Lake Superior Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Rose Quartz Druzy

Silicon Dioxide (SiO2)

Sunstone

Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))

Mookaite Jasper

Silicified Radiolarite (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Blue Lace Agate

Silicon Dioxide (SiO2)

Rose Quartz

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

Dendritic Agate

Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)

Beryl (Emerald or Aquamarine in Matrix)

Beryllium Aluminum Silicate (Be3Al2Si6O18)

Aquamarine (Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Smoky Quartz

Silicon Dioxide (SiO2)