4.4" Green Titanite (Sphene), Calcite, and Muscovite - Pakistan

Titanite is a calcite titanium nesosilicate with the chemical formula CaTiSiO5. It is a relatively rare mineral that has applications as both a gemstone and as a minor source of titanium ore. As a gemstone, titanite is known as "sphene" and exhibits an excellent light dispersion superior to that of cut diamonds. Depending on impurities, titanite can bear a variety of colors including brown, black, green, grey, or yellow, with rarely occurring orange, pink or red crystals. Some impurities that can effect titanite's color include aluminum, chromium, sodium, magnesium and manganese, and in rare cases rare elements such as cerium, niobium, and yttrium.