Sedimentary And Metamorphic

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Milky Quartz (Water-worn pebble/nodule)

Quartz (Silicon Dioxide - SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Fuchsite (Green Muscovite)

K(Al,Cr)2(AlSi3O10)(OH)2

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Lazurite-rich metamorphic rock; (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Lapis Lazuli (prominent blue specimen in collection)

Lazurite-rich metamorphic rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2

Banded Sandstone (Zebra Stone)

Arenite with Iron Oxide Banding (Liesegang rings)

Sandstone with Ironstone Concretion

Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli (Low Grade)

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Sandstone Concretion

Sedimentary concretion

Sandstone or Limestone

Sedimentary Rock

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Sandstone

Arenite (primarily SiO2)

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

Shale

Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)

Shale

Clastic sedimentary rock (primarily clay and silt minerals)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Shale

Shale (Lutite)

Shale

Fissile mudstone (rich in clay minerals and quartz)

Shale

Fissile mudrock (composed primarily of clay minerals and quartz)

Yellow Jade (Nephrite or Jadeite)

Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 or Jadeite: NaAlSi2O6

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Greenstone

Chlorite schist / Meta-basalt

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Lapis Lazuli

Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartzite

Quartzite (SiO2)

Rhodonite

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

Almandine Garnet

Almandine (Fe3Al2Si3O12)

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Nephrite Jade

Tremolite-Actinolite solid solution Ca2(Mg,Fe)5Si8O22(OH)2

Lapis Lazuli

Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite

Schist

Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])

Quartzite

Quartzite (SiO2)