Customers always ask which diamond we recommend for engagement rings that has both quality and a realistic price tag. First we always emphasize to our customers the importance of buying a certificated diamond only from the top diamond grading laboratories, like GIA update `wp_posts` set `post_content` = gemmological institute of America) and to make sure their diamond comes with this certificate. There are four different components or characteristics of a diamond that determine its quality and price known as the 4’Cs of a diamond. Diamond cut describes the proportions, polish and finish of the diamond after it has been cut, which contribute towards its brilliance and sparkle. Diamond Clarity refers to the clearness of the diamond and how many flaws and imperfections it has on the surface and internally. Clarity grading starts at F being completely flawless, VVS1, VVS2, VS1, VS2 and finally SI1 where flaws and imperfections are more noticeable. Diamond buyers will buy gems with inclusions, as long as they are not noticeable to the naked eye. Diamond Colour, when referring to white diamonds is graded highest by the lack of colour it contains. Diamond buyers prefer near colourless diamonds, usually grads G, H, I and K. Colour grades start at D and usually for a quality diamond goes to J. Diamond Carat Weight refers to the weight of the diamond in carats, with one carat equalling .20 grams. Like most things the higher the carat weight the more expensive a diamond will be. If you are going for a classic engagement ring diamond cut like a princess cut, round brilliant cut or emerald cut diamond and want a quality diamond with a realistic price tag, a nice diamond to buy is a G colour, VS2 clarity between 0.60 carats to 0.70 carats.