Gemstone

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Tektite (Indochinite)

Tektite (High-silica impact glass)

Dendritic Opal (Merlinite)

Hydrated Silica with Manganese/Iron oxide inclusions (SiO2·nH2O)

Blue Lace Agate

Cryptocrystalline Quartz (SiO2)

Peridotite (Olivine)

Peridotite (comprising (Mg,Fe)2SiO4)

Sodalite

Na8(Al6Si6O24)Cl2

Carnelian

Carnelian (SiO2)

Blue Quartz (specifically Dumortierite Quartz)

Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)

Smoky Quartz Cluster

Quartz (Silicon Dioxide) - SiO2

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or limonite inclusions

Jasper

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

Green Aventurine (worked as a bead/sphere)

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Milky Quartz

Silicon Dioxide (SiO2)

Jasper

Silicon dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Jasper

Silicon dioxide (SiO2)

Moss Agate

Chalcedony (Silicon Dioxide - SiO2) with inclusions

Chrysocolla on Matrix

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

Amazonite

Potassium Feldspar (KAlSi3O8) with lead impurities

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Chrysocolla

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

Tiger's Eye

Tiger's Eye (SiO2 with crocidolite inclusions)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Fluorite, Turquoise, and Calcite set

Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)

Rose Quartz

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

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Dendritic Opal

Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions

Jasper with Epidote (Unakite-related)

Epidotized Quartzite (composed of Quartz, Epidote, and Feldspar)

Quartz (Milky or Smoky Quartz)

Quartz (Silicon Dioxide, SiO2)

Carnelian (Red-Orange Chalcedony)

Silicon Dioxide (SiO2)

Rose Quartz

Quartz (Silicon Dioxide, SiO2)