Mineral (Primary Constituent)

Staurolite (Fairy Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Specular Hematite

Specularite (Fe2O3)

Sandstone

Sandstone (clastic sedimentary rock)

Quartz (various varieties)

SiO₂ (Silicon Dioxide)

Covellite

Covellite (CuS)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Blue Calcite

Calcium Carbonate (CaCO3)

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Rough Green Tourmaline (Verdelite)

Elbaite (Complex Borosilicate), Na(Li,Al)3Al6(BO3)3Si6O18(OH)4

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Biotite Schist

Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)

Pyrite (Cube variety)

Iron Sulfide (FeS2)

Tiger's Eye

Silicon dioxide with crocidolite fibers (SiO2 with chrysotile amphibole inclusions)

Rutilated Quartz

Quartz with Rutile Inclusions (SiO2 with TiO2 inclusions)

Feldspathic Granite (likely Syenite or Granite Pegmatite)

Phaneritic Acidic Igneous Rock (KAlSi3O8 dominant with SiO2)

Mixed Gemstone Bracelet

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

Labradorite

Labradorite (a calcium-enriched sodic plagioclase feldspar mineral - (Ca, Na)(Al, Si)4O8)

Dioptase

Dioptase (CuSiO3 · H2O)

Amethyst (as part of a multi-stone bracelet)

Silicon Dioxide (SiO2) with iron impurities

Pyrite

Iron Sulfide (FeS2)

Desert Rose

Baryte or Gypsum variation (CaSO4·2H2O or BaSO4)

Desert Rose

Selenite Rose (Gypsum: CaSO4·2H2O)

Malachite

Malachite [Cu2CO3(OH)2]

Included Quartz (Garden Quartz / Lodolite)

Quartz (SiO2) with various mineral inclusions

Chrysocolla

Hydrated copper phyllosilicate, Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)

Rhodonite

Rhodonite; (Mn,Fe,Mg,Ca)SiO3

Pyrite

Iron Sulfide (FeS2)

Smoky Quartz

Silicon Dioxide (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Citrine Quartz

Crystalline Silicon Dioxide (SiO2) with Ferric Iron impurities

Staurolite (Cross Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Amazonite

Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)

Watermelon Tourmaline in Quartz Matrix

Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4

Schorl (Black Tourmaline) in Pegmatite

Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)

Smoky Quartz

SiO2 (Silicon Dioxide)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Lapis Lazuli (Lazurite crystals on Marble)

Lazurite / (Na,Ca)8[(S,Cl,SO4,OH)2|(AlSiO4)6]