How to Determine Diamond Quality
The world's largest diamond, The Golden Jubilee Diamond, was initially suspected to be worthless. This diamond, which when discovered weighed 755 carats, was…well, ugly. It was only after the diamond was cut down to its still-record-breaking size of 545.67 carats that its beauty appeared. Diamond quality is not only determined by weight, or carats. Size matters but overall appearance, shape, and color also help determine diamond quality.
Gemologists use the "4 C's" to grade diamond quality. With a bit of research as to what criteria you need to look for in a diamond, you can also use the 4 C method. The 4 C's are: cut, color, clarity, and carats. Cut is extremely important. A diamond's cut (princess, marquis, heart, pear, et cetera) helps it reflect light. Every diamond has facets, or sides. A good cut allows all the facets to shine and sparkle. Color is also important. The most prized diamonds are colorless or brightly colored, "fancy" diamonds. Most diamonds have a yellow or brown tint which can reduce value and overall diamond quality. In contrast, a fancy diamond or a clear diamond is highly valued.
Clarity refers to the number of flaws on the interior or exterior of the diamond. Carats are units of weight.
Diamond Quality vs. Diamond Value
The Golden Jubilee Diamond was originally referred to as the 'Unnamed Brown" due to the fact that it was an unattractive brown color. Once it was transformed into its current "fire rose cushion" cut, its many facets caught the light, exposing its gorgeous golden-brown hue. It also exposed the fact that the diamond is virtually flawless. The clarity, cut, color, and carats all added up to determine the overall diamond quality of the Golden Jubilee Diamond.
When purchasing diamonds, it is important to know the 4 C's in order to obtain the best diamond quality and value. It is also important to pick a jeweler that is certified by the Gemology Institute of America (GIA) or a graduate of another Gemology program. Choosing a diamond certified by the GIA is also recommended. This certifies the diamonds' quality and may help maintain the value of your diamond. Ask if the diamond has been treated. Many diamonds have been filled with glass, painted, or treated with heat. These temporary fixes make the diamond appear better quality than it really is but they wear off quickly. Certification by the GIA will protect you from buying a substandard diamond.
