Will probably be your engagement and diamond wedding rings so make sure you know you're getting what you've paid for. Diamonds are valued on the four C's: carat, color, clarity, and cut.
Carat refers to the weight of the diamond not how big it looks. Differently shaped diamonds can look larger or smaller than other diamonds of the same weight. Carat weights should be exact. A diamond that weights .999 carats will have a proportionally lesser value than a diamond that is 1.111 carats because diamonds over 1 carat are valued at a higher value per carat then diamonds under 1 carat. For example: A 3 carat diamond may valued at 6 times the value of a one carat diamond other things equal.
Color in diamonds means the closer to pure blue white the more expensive the diamond. As the diamond proceeds to a more yellowish cast the less valuable it is. The perceived color can be influenced by the light it's viewed under and the background, as well as the color of its setting.
Clarity refers to the inclusion of any flaws that can be seen under a 10X magnification, what type of flaw and where it's located.
Cut means how the diamond is faceted not the shape the diamond takes.
Know the 4 C's of value diamond valuation and you'll receive full value for your engagement and diamond wedding rings.