Mineral (Found In Igneous And Metamorphic Rocks)

Yellow Calcite

Calcium Carbonate (CaCO3)

Brown Agate

Silicon Dioxide (SiO2)

Schorl (Black Tourmaline) in Matrix

Sodium Iron Aluminum Borosilicate Hydroxide (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)

Staurolite (Cross Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Nuummite

Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite)

Smoky Quartz

SiO2 (Silicon Dioxide)

Quartz Pebble (often referred to as 'Sea Glass' or 'River Stone' when worn smooth)

Silicon Dioxide (SiO2)

Rhodonite

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

Milky Quartz

Silicon Dioxide (SiO2)

Sapphire (Corundum)

Corundum (Al2O3), variety Sapphire

Smoky Quartz

Silicon Dioxide (SiO₂)

Gold Ore

Native Gold (Au) in Matrix

Pyrite

Iron Disulfide (FeS2)

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Rhodonite

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Arsenopyrite in Quartz Matrix

Arsenopyrite (FeAsS) with Quartz (SiO2)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Gneiss (Banded Gneiss)

Gneiss

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Mica Schist

Mica Schist (predominantly Muscovite or Biotite)

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz (with inclusions)

Silicon Dioxide (SiO2)

Garnet

Almandine (Fe3Al2(SiO4)3)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Ruby in Zoisite

Anyolite (combination of Ca2Al3(SiO4)3(OH) and Al2O3:Cr)

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Amethyst (Quartz)

Silicon Dioxide (SiO2) with Iron impurities

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Beryl (likely Emerald or Aquamarine in matrix)

Beryllium aluminum silicate (Be3Al2Si6O18)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Sodalite

Na8(Al6Si6O24)Cl2

Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)