If you want to understand jewelry by gram, then imagine browsing through a catalog of jewelry where the price of the jewelry is not displayed by pieces, which is the traditional model of selling jewelry, but rather, it is displayed by weight. The key benefit of buying jewellery by gram is, that since you are purchasing wholesale jewelry in bulk (because in jewellery in gram, you are purchasing an entire lot as opposed to an individual piece), the jewelry becomes more economically viable.