Titanite is typically found in calcium-rich metamorphic rocks and scattered in some granites. Its chemical formula often includes other elements (Nb, Cr, F, Na, Fe, Mn, Sn, V or Yt). Titanite has long been known as sphene
. That name is now deprecated by the mineralogical authorities, but you may still hear it used by mineral and gem dealers, collectors, and geological old-timers.
Other Primary Minerals