Precious stones are not paid per gram but its quality and looks...but im not sure if there are any legitimate buyer of it in the philippines this days...i have a friend too who owns a diamond he acquired from treasure hunting, he takes years finding buyer and he fails, some are even offering him 150 pesos each which is absurd! and least he found an arab buyer who buy it 30K each...and this arab sold it at staggering 35thousand US dollar each after re-polishing! Well im not going to reveal this to my friend, he will get crazy im sure!!!