Mineral (Gemstone)

Labradorite (a variety of Anorthosite or Plagioclase)

Labradorite (member of Plagioclase Feldspar series), (Ca,Na)(Al,Si)4O8

Pallasite Meteorite

Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Garnet (Almandine variety)

Almandine, Fe3Al2(SiO4)3

Quartz

Silicon Dioxide (SiO2)

Red Jasper (River Polished)

Jasper (Silicon Dioxide, SiO2)

Malachite

Copper carbonate hydroxide Cu2CO3(OH)2

Epidosite (Epidote-rich rock)

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

Ammonite Fossil (Polished Section)

Ammonoidea (typically mineralized with Calcite CaCO3)

Yellow Jasper (Mookaite style)

Silicon Dioxide (SiO2) with Goethite/Hematite inclusions

Amber

Succinite (with formula approximately C10H16O)

Quartz (Crystal Point/Fragment)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Almandine Garnet & Tumbled Citrine Quartz

Fe3Al2(SiO4)3 (Garnet) and SiO2 (Quartz)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Rough Quartz (likely Milky or Smoky Quartz)

Silicon Dioxide (SiO2)

Tektite

Tektite (Amorphous silica rich glass)

Chevron Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Amethyst Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Raw Rose and Milky varieties)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian type)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood)

Silicified fossil wood (SiO2)

Pearl

Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Carnelian (Orange Chalcedony)

Silicon Dioxide (SiO2) - variety of Chalcedony

Amethyst Geode

Amethyst (Silicon Dioxide), Formula: SiO2

Pegmatite (Granitic)

Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)

Basalt-Amugydule (Amygdaloidal Basalt)

Aphanitic Mafic Igneous Rock with Vesicle Infillings

Garnet in Matrix (likely Almandine in Quartz/Mica Schist)

Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock

Jasper

Jasper (Silicon Dioxide, SiO2)

Staurolite (Fairy Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Kimberlite

Kimberlite (Group I or II)

Pink Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)