Selecting a diamond for your engagement ring online can be challenging if you don’t have a few simple tips to help you choose the best diamond for your budget.The Most Important Ones Being -Carat: Carat is a weight. A one-carat diamond, depending on its cut, will have a range from approximately 6.1 to 6.5 MM's. Diamond prices rise exponentially once they reach the one-carat mark due to popularity and rarity. If you’re looking for a nice size stone at a lower price point search from .80 to .99 carats. They will range in MM size from 5.8 to 6.2. Cut: The Cut is what makes the diamond sparkle. In searching for a Very Good or Excellent Cut diamond look for a Table and Depth between 58 and 60%. My preference is to get as close to a Table/Depth of 60-60% as possible, with a 1.00 to 1.01 Length to Width Ratio.Color: Color-less is preferred and G is a good place to start. G is a warmer white while D is a cooler white. G through D are considered premium will command a higher price, with D as the most expensive color due to its rarity.Clarity: The Clarity of a diamond refers to the visibility and number of inclusions in a diamond. Every person has a different level of tolerance when viewing a diamond with inclusions. All types of inclusions are not created equal, wisps and twine are thin and white so a few of these won't effect the over all appearance of the diamond.