Diamonds are forever, and that is the reason why you are gifted with diamonds on special occasions. They have been treasured since time immemorial, they are mostly used in engagement rings. This precious gem is very very expensive and that is the reason that you should always buy a diamond only after assuring of its purity. just imagine that you purchased a diamond and you were happy that you will keep it for lifetime but after a while you realise that the diamond on which you spent a huge amount is fake you would be so disheartened, I know this imagination would have shivered you. So, prevention is better than cure.
So, I have brought for you a few things to be unfailingly kept in mind before purchasing a diamond:

First of all make sure of the kind of diamond you want to buy, whether it is a small one or a huge diamond. But always keep in mind that the price of the diamond always varies with its quality. Like a small diamond will be much expensive to a bigger one of the inferior quality.