Organic Gemstone (Fossilized Resin)

Sunstone (Heliolite)

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

Precious Opal

Hydrated amorphous silica (SiO2·nH2O)

Rhodonite

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

Smoky Quartz

Silicon Dioxide (SiO2)

Carnelian Agate

Carnelian (Silicon Dioxide, SiO2)

Zoisite with Ruby / Anyolite

Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)

Agate

Banded Chalcedony (SiO2 - Silicon Dioxide)

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Garnet (likely Almandine)

Almandine Garnet, Fe3Al2(SiO4)3

Emerald

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

Chrysoprase

Silicon Dioxide (Nickel-bearing Chalcedony) - SiO2

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Turquoise

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

White Topaz

Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8

Jasper (Mookaite style)

Silicon Dioxide (SiO2) with iron and manganese inclusions

Aquamarine

Beryl (Be3Al2Si6O18)

Amazonite

Potassium Aluminum Silicate (KAlSi3O8)

Sunstone

Oligoclase or Andesine (Feldspar Group), (Ca,Na)((Al,Si)4O8)

Chalcedony (Yellow/Honey variety)

Microcrystalline Quartz (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Druzy/Crystal Cluster)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rose Quartz

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

Ocean Jasper (Orbicular Jasper)

Spherulitic Chalcedony (SiO2)

Smoky Quartz

Silicon Dioxide (SiO₂)

Alexandrite

Chrysoberyl (BeAl2O4)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz (Crystal Fragment)

Quartz / Silicon Dioxide (SiO2)

Yellow Aventurine

Quartzite with inclusions (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

White Jade / Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst

Amethyst (SiO2 with iron impurities)

Yellow Aventurine

Quartzite with Muscovite/Sericite inclusions (SiO2 + KAl2(AlSi3O10)(OH)2)