A good understanding of diamonds is necessary before you begin shopping.

Before making a diamond purchase one must know the 4 C's first; carat weight, diamond clarity, diamond color and diamond cut (not shape). Other advanced characteristics of diamonds include diamond fluorescence and diamond enhancements. By understanding what all the diamond characteristics are and what to ask when purchasing a diamond, you are much more empowered when it comes time to make your diamond investment.

When purchasing diamonds either for your engagement ring, diamond stud earrings, tennis bracelets or other jewelry, make sure the diamonds you select best suit that type of jewelry application.

Some diamond qualities are best suited for engagement rings while others are best suited for diamond stud earrings.

Diamonds can be manipulated in all sorts of ways to make them more attractive, and that's perfectly fine, because it makes what would otherwise be less desirable diamonds more attractive and more affordable. But if a diamond has been altered, it's something you should know before you buy it. Get the information you need to make an informed diamond purchase, beginning with the basic Four Cs, and then dig deeper to learn the ins and outs of diamond treatments. Finish up by exploring diamond shapes and colors and all sorts of setting methods.