Selling diamonds, like anything else, is a risky operation, with many factors to consider.
Like time, need, the value of the jewelry you have to sell and the condition of the market.

Finding the best place to sell diamonds is a process that will produce different results for different people.

Before looking for a seller, find out what it is you have to sell. Getting the stones appraised is very important if you want to make sure that you will get a fair price. This may cost some money, but is well worth the expense.
Remember, depending on how you sell the diamonds, you may get more or less than the appraised value, but at least you will be able to consider any offers against a baseline value.

The first rule is to make sure that the dealer you give your jewels to has a good reputation.
Regardless of what kind of dealer you end up with, form pawn shop to appointment only salon, check them out before you do business.

The Better Business Bureau
can help you, as can a quick Internet search for complaints.
Be careful that you don't make a snap judgment based on one or two negative comments. Even the best dealer will get complaints from problem customers from time to time.

Next, set your priorities. Finding the best place to sell diamonds requires a bit of thought.
Is time the most important factor?
If so, you may need to sell the gems outright deal to local jewelers, resellers and even pawn shops. These kinds of businesses specialize in giving a fair price but they have no guarantee that they will be able to resell the item later on. Their profit depends on keeping the margin slim.

If you have more time, or jewels of higher value, a company that will take your gems on consignment may be the best place to sell diamonds.
Basically, they will try to sell your jewels for a fee off the top.
Since you are giving the merchandise over to the jeweler with only their promise of a sale or a return, make extra sure that you are dealing with a reputable firm.