Tales of Tolgard
Also known as kyanite, disthene is an abundant ornamental stone that is easily cleaved, but difficult to cut in facets without unintended splitting occurring. It usually has many inclusions. Disthene is found in crystals ranging in color from dark blue to pale green. Translucent, blue, facet-grade crystals are the most prized. Disthene sees magical use as a powdered ingredient in spell inks and the spells themselves that involve controlled fiery effects.