Mineral With Metamorphic Or Sedimentary Host

Schist with Quartz Vein

Mica Schist with Crystalline Quartz (SiO2)

Pyrite Geode (Sparkling Druzy)

Iron Sulfide (FeS2) in Sedimentary Nodule

Quartz (Milky Quartz/Citrine Type)

Silicon Dioxide (SiO2)

Jasper (Iron-rich)

Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)

Jasper or Agate pendant

Silicon dioxide (SiO2)

Quartz on Host Rock

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Rutilated Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions

Yellow Sapphire

Corundum (Al2O3) with iron impurities

Emerald

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

Rough Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

Milky Quartz

Silicon Dioxide (SiO2)

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Rough Garnet in Matrix

Almandine Garnet (Fe3Al2Si3O12)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Chalcedony in Host Rock

Chalcedony (SiO2)

Fluorite with Quartz coating

Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Banded River Cobble with Mafic Dike

Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Quartz-veined Schist (or Metasandstone)

Metamorphic Rock with Quartz Veining (SiO2)

Gold-bearing Quartz

Lode Gold in Silicon Dioxide (SiO2)

Mica (Biotite or Phlogopite variety)

Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)

Milky Quartz with Garnet/Hematite and Basalt

Silicon Dioxide (SiO2) with Almandine (Fe3Al2Si3O12) and Basalt

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Chalcopyrite in Quartz (Gold Ore Matrix)

CuFeS2 (Chalcopyrite) with SiO2 (Quartz)

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Emerald

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

Rough Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Honey Calcite Geode Segment

Calcite (Calcium Carbonate, CaCO3)

Feldspar (Orthoclase)

Potassium Alveolar Silicate (KAlSi3O8)

Yellow Aventurine

Silicon Dioxide (Quartz with inclusions), SiO2

Sapphire

Corundum (Al2O3)

Turquoise

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

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within a metamorphic matrix

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Banded River Rock with Quartz Vein

Siltstone/Greywacke with Quartz (SiO2)

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Yellow Jasper

Silica (Silicon Dioxide, SiO2) with iron inclusions