Metamorphic

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Ruby in Matrix

Corundum (Al2O3)

Aventurine

Silicon dioxide with micas (SiO2 + K(Al,Cr)2AlSi3O(OH)2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Smoky/Grey variety)

Silicon Dioxide (SiO2)

Magnetite (in matrix)

Magnetite (Fe3O4)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Jadeite (variety of Jade)

Jadeite, NaAlSi₂O₆

Jadeite (Jade)

Jadeite; NaAlSi2O6

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Pyromorphite on Epidote

Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]

Serpentine

Serpentine-group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Native Gold (in Jewelry)

Gold (Au)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Pyrite

Iron Disulfide (FeS2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions

Moonstone (Adularia)

Potassium aluminum silicate (KAlSi3O8)

Chalcopyrite

Chalcopyrite (CuFeS2)

Green Aventurine

Silicon dioxide (SiO2) with Fuchsite inclusions

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Quartz with Muscovite Mica

SiO2 with KAl2(AlSi3O10)(OH)2

Pyrite

Iron Sulfide (FeS2)

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite mica)

Jade (Nephrite or Jadeite)

Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)

Quartz

Silicon Dioxide (SiO2)

Rhodonite

Rhodonite (MnSiO3)

Garnet (likely Almandine)

Almandine Garnet, Fe3Al2(SiO4)3

Iolite

Cordierite (Magnesium iron aluminium silicate)

Pyrite

Pyrite (Iron Disulfide), FeS2

Jade

Jadeite or Nephrite (both are commonly referred to as 'jade'). Jadeite: NaAlSi2O6; Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2.

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Black Star Diopside

Diopside (CaMgSi2O6) with asterism

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Quartzite (likely Iron-stained)

SiO2 (Metamorphosed Sandstone)

Mica Schist

Mica Schist (Composition typically includes Muscovite KAl2(AlSi3O10)(OH)2 and Quartz SiO2)

Painted River Rock

Artificially Coated Sedimentary Rock

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Muscovite Mica in Quartz Matrix

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)