Mineral Specimen

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Citrine (Heat-treated Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Jasper with Epidote

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))

Chrysocolla in Quartz (Gem Silica)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / SiO2 (Quartz)

Granite

Granite (Felsic intrusive igneous rock)

Botryoidal Goethite

Goethite (α-Fe3+O(OH))

Amazonite

Microcline (Amazonstone), K(AlSi3O8)

Rough Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Blue Kyanite

Kyanite (Al2SiO5)

Paraiba Tourmaline

Elbaite Tourmaline (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) - Copper-bearing

Quartz Druzy Geode Fragment

Silicon Dioxide (SiO2)

Amazonite

Potassium Feldspar (KAlSi3O8)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Emerald

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

Zoisite with Ruby (Anyolite)

Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)

Amethyst (Pale/Light Variety)

Quartz (Silicon Dioxide) with Iron impurities - SiO2

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Amethyst

SiO2 (Silicon Dioxide)

Ocean Jasper

Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)

Botryoidal Chalcedony Geode

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Emerald In Matrix (Quartz/Calcite)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Sapphirine in Matrix

Sapphirine (Mg,Al)8(Al,Si)6O20

Amazonite

Tectosilicate (variety of Microcline), K(AlSi3O8)

Smoky Quartz

Silicon Dioxide (SiO2)

Chrysocolla in Matrix

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)

Beryl (likely Aquamarine or Green Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Desert Rose

Gypsum (CaSO4·2H2O) or Barite (BaSO4) inclusions in sand

Limonite/Goethite Gossan

FeO(OH)·nH2O (Hydrated iron oxide)

Hypersthene

Hypersthene ((Mg,Fe)SiO3)

Chrysocolla

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O

Epidote (likely Unakite component or Epidosite)

Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))

Celestine (or Celestite) on Matrix

Celestine (SrSO4)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Charoite

K(Ca,Na)2Si4O10(OH,F)·H2O

Raw Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)