Analyze the Cut
If you are buying online, seeing the diamond and analyzing the brilliance and fire yourself is impossible to do from the computer. Search for diamonds with excellent or very good cut ratings. Then, when you have the loose diamond in your hand, analyze it under different types of light: fluorescent, natural, dimly lit, and brightly lit settings. If there is something you do not like about the diamond, most online retailers have a return policy.
Decide on Carat Weight
Knowing the desired carat weight helps you immediately narrow your loose diamond search because it essentially determines the size of the diamond you want. It also affects the price you pay. However, try not to be too set on a number as diamonds slightly below your desired carat weight can have the same visual size and have higher cut and color grades. Sacrificing size for a better quality diamond is usually a smarter move.
Choose the Shape
Knowing the cut shape of your diamond helps refine your search, especially if the diamond you are searching for is a fancy shape (any cut other than a round or princess cut). Also, because they have a much lower yield from the original diamond rough, round brilliant loose diamonds tend to cost more than fancy shapes.
Consider Your Budget
Knowing the price you are comfortable to pay for the diamond is a good place to start your loose diamond search, as this will guide the specific size and quality stone you are getting. Remember, after you purchase the loose diamond, you will also have to buy the setting. Do not forget to consider that when building your budget.
Make Sure You Leave Time For Delivery
Because you’re ordering online, you have to consider that it will take time for the diamond to arrive. Don’t plan that proposal until the ring is finalized and in your hand!
Other than seeing the diamond yourself, it is important that you also see the diamond certification (IGI, GIA, AGS, or EGL). You should never purchase a loose diamond without a certification from a well-respected grading laboratory.
Take It To A Professional
After your diamond or ring is delivered to you, take it to a professional appraiser to make certain it is the same diamond as the certification report describes. It is even better if the appraiser is a certified gemologist, but avoid jewelry retailers who may try to upsell you for no reason.
Don’t Forget The Setting!
Remember, after analyzing the cut, color, carat weight, and clarity of the diamond, and after purchasing it, you still have to consider the setting. What type of band would suit the diamond and the recipient best? Where and how will you have the diamond set?