There are many different factors that affect the value of a diamond. Diamond symmetry is how the various facets of the diamond align and intersect. Poor symmetry misdirects light into the gem, which reduces its brilliance. This ultimately affects the price of the gem, although good diamond cutters may allow minor reductions in symmetry to hide a defect in the natural stone.

Symmetry Grades

The Gemological Institute of America (GIA) is the oldest and largest independent laboratory in the world for grading diamonds. They offer a scale to grade symmetry, which helps diamond buyers in AZ determine the value of your diamond.

• Excellent - No defects visible at 10x magnification
• Very Good - Defects are extremely difficult to see at 10x
• Good - Defects are difficult to see at 10x
• Fair - Defects are clearly noticeable at 10x, and they may be visible without magnification
• Poor - Defects are visible to the naked eye. Many jewelers buying diamonds won't deal in poor grades.

Recommendations When Choosing a Diamond

You should go with a diamond that has a grade of good or better. You will get the most out of your dollars, unless you're looking for an ideal cut diamond, which needs a grade of very good or better in symmetry. In fancy cut diamonds, you may have a difficult time finding a diamond symmetry grade of more than good or very good, because the cutter may have to sacrifice symmetry to get the best cut out of the gem.

Symmetry is not the only measure of a valuable gem, but it can be the tie breaker when comparing two diamonds. Buying and selling diamonds depends on a number of factors, but when you go to a reputable jeweler with GIA-certified gemologists, you get the most accurate appraisal of your valuable jewels. Look for a company with a long history in the community and always check its reputation with the BBB before selling or buying valuable gems. Do your homework to get the best deal. For more information on diamond symmetry, call (480) 949-9299 today to speak with the experts at Ralph Mueller and Associates.