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Fire and brilliance setting height3/2/2024 The diamond industry as well as the public can use cut along with color, clarity, and carat weight to help them make more informed decisions when assessing and purchasing round brilliant diamonds. Because each cut grade represents a wide range of proportion sets, individuals have the freedom to choose which particular appearance they prefer within the grade range. While it is important to consider many components when assessing the overall cut appearance and quality of round brilliant diamonds, an individual's preferences also play a role. It is important to note that a wide range of proportion combinations are possible, and these ultimately affect the stone’s interaction with light and how attractive the diamond is to the person viewing it. The proportions of a diamond refer to the relationships between table size, crown angle and pavilion depth. The large, flat facet on the top is the table. A round brilliant cut diamond has 57 or 58 facets, the 58th being a tiny flat facet at the bottom of the pavilion that’s known as the culet. The major components, from top to bottom, are the crown, girdle and pavilion. There are many different proportion sets that produce attractive diamonds.įor example, look at a side view of the standard round brilliant. Each cut grade, based on a relative scale from Excellent to Poor, represents a range of proportion sets and face-up appearances. In GIA’s system, each component is assessed individually, taking into account the relative importance of that component in the overall cut quality of the diamond. The remaining four - weight ratio, durability, polish, and symmetry - are related to a diamond's design and craftsmanship. The first three - brightness (the total light reflected from a diamond), fire (the dispersion of light into the colors of the spectrum), and scintillation (the pattern of light and dark areas and the flashes of light, or sparkle, when a diamond is moved) - are appearance-based aspects. The GIA Diamond Cut Grading System for standard round brilliants in the D-to-Z color range is based on the assessment of seven components. ![]() The allure and beauty of a particular diamond depends more on cut quality than anything else. Applied Jewelry Professional ™ Online DiplomaĬut quality is the factor that fuels a diamond’s fire, sparkle and brilliance.
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