• It refers to a diamond's weight, not its size.
  • Diamond weights are stated in metric carats, abbreviated “ct.” One metric carat is two-tenths (0.2) of a gram. The metric carat is divided into 100 points. A point is one hundredth of a carat. In general, there is a ‘technique’ to maximize your budget. For example, instead of a 2.0-carat diamond, consider buying a 1.9-carat weight of diamond. This will save a considerable amount of money and the slight size difference will never be noticed.


  • A diamond's color refers to its lack of color. The less color, the higher the color grade.
  • Gemological Institute of America's (GIA) D-to-Z color-grading scale is the industry's most widely accepted grading system. The scale begins with the letter D (The starting letter of Diamond), representing colorless, and continues, with increasing presence of color, to the letter Z. There are totally 23 grading levels. Many of these color distinctions are so subtle that they are invisible to the untrained eye; however, these distinctions make a very big difference in diamond quality and price.


  • Since the diamond formed deep within the earth, under extreme heat and pressure, they often contain unique birthmarks, either internal (inclusions) or external (blemishes). Diamond clarity refers to the absence of these inclusions and/or blemishes. The fewer and less visible the inclusions and/or blemishes, the higher the clarity grade.
  • Diamonds without these birthmarks are rare, and rarity affects a diamond’s value. Using the Gemological Institute of America’s (GIA) International Diamond Grading System™, diamonds are assigned a clarity grade that ranges from flawless (FL) to diamonds with obvious inclusions (I3). There are totally 11 levels of grade. In general, it is worthwhile to select an "eye-clean" diamond - one that has no imperfections visible to the unaided-eye through the crown.


  • Cut quality is the factor that fuels a diamond’s fire, sparkle and brilliance. Not only do well-cut diamonds appear more brilliant, they also tend to appear larger than other diamonds of the same carat weight. When a diamond is cut with the proper proportions, light is returned out of the top of the diamond. If it is cut too shallow, light leaks out of the bottom; too deep and it escapes out of the side.
  • In Gemological Institute of America’s (GIA) system, there is a relative scale from Excellent to Poor, totally 5 grades, represents a range of proportion sets and face-up appearances. A Well-Cut Diamond is perfectly proportioned to refract light, producing that fire and brilliance up through to the table and crown.