Jayalath, R.D.M.G; Sandaruwan, P.D; Udawatte, C.P; Wanniarachchi, D.N.S; Wijesekara, H; Diyabalanage, R.S
(Sabaragamuwa University of Sri Lanka, 2020-12-16)
Sri Lanka is known the world over for its wide variety of coloured gemstones. In
addition to the good quality gemstones, low-quality gemstones (Geuda) are found in
Sri Lanka. Heat treatment is a physicochemical method ...