[header] How to buy diamonds online [title] Set a budget for your purchase. [substeps] If buying a loose diamond don't forget to leave money for a setting. For engagement rings many people follow a rule of thumb of 3 times monthly salary but there are no set guidelines. 
Many jewelers will offer a layaway plan that will allow you to pay for the purchase over time at lower interest rates ten a credit card. Check whether there are any coupons and discounts, as lots of online diamonds selling services offer them regularly.