4 FLINT GENUS. Hard in a high degree, yielding a little to the file. Eafily frangible. It is not particularly heavy, approaching to heavy* Specific gravity—3,981. Constituent Parts. Diamond fpar of China. Alumina 84,00 Silica 6,50 Oxyd of iron 7,50 Lofs 2,0 100,0 According to Klaproth' Geognostic Situation. Probably occurs in granite. Geographic Situation. Has been hitherto found only in China.