Alexandrite, Amphibole Group, Augite, Calcite, 'Chromian Elbaite,
Dawsonite, Diopside, Dolomite, Emerald, Feldspar, Francolite, Graphite,
Grossular, Kyanite, Limonite, Magnesio-axinite, Muscovite, Natrolite,
Opal, Pyrite, 'Pyroxene Group, Quartz, Sapphire, 'Scapolite,
Sillimanite, Tanzanite, Tsavorite, Umbalite