View grade column for common quick reference grades used in the jewelry trade. Our value charts are based on accurate and up to date information on average retail prices. Determining the value of gemstones is one of the most important things both manufacturers and consumers must do before purchasing a gemstone. It can be difficult to understand gemstone grades without training so with the help of the fire mountain gems and beads gemologists we ve created a chart to help clarify the basics. Our gemstone grade chart is easy to use.
Gemstone grades and descriptions. Gemstone color chart the standard way to organize gemstones is by gem species corundum beryl quartz etc and variety ruby sapphire topaz spinel etc. The chart below details the clarity type assigned for most of the different gemstone varieties available today. Many people often confuse and misuse the four c s. A perfect stone with perfect clarity or clearness is rare.
Of course other factors can impact a gem s appearance and structure most notably the cut. A gemstone s cut the workmanship that went into fashioning it is one of the most important factors in gem grading. Color carat weight clarity cut. Depending on the nature of the stone the assigned clarity grade is based on what is considered to be normal with regard to inclusions. While there is a strict scale to grade diamonds on that was devised by the gemological institute of america gia there is not an international standard for grading clarity in colored gems.
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Colored gemstone clarity scale. Gemstone clarity grading has become increasingly important for the sales of gemstones and gemstone jewelry via the internet where customers cannot see the gemstones in person. Average retail prices dec 2020. Gem clarity is an important factor used to evaluate the quality and value of a gemstone. A gemstone s clarity grade indicates the relative absence of inclusions materials trapped inside the gem fractures and blemishes surface imperfections that affect its appearance and structural integrity.Each step of grading focuses on a different feature and has many details that create the overall grade determination. But for gemstone and jewelry collectors it is sometimes useful to organize gems by color. For each gemstone we provide a detailed and comprehensive value chart which will help you evaluate its price based on the following criteria. The gemstone clarity scale was created specifically for grading diamonds more specifically white diamonds not colored gemstones for colored gemstones it is difficult to use a one size fits all classification system for clarity since some colored gemstones are expected to have inclusions and are sometimes even identified by their inclusions. Each step of grading focuses on a different feature and has many details that create the overall grade determination.
The gemstone clarity scale was created specifically for grading diamonds more specifically white diamonds not colored gemstones for colored gemstones it is difficult to use a one size fits all classification system for clarity since some colored gemstones are expected to have inclusions and are sometimes even identified by their inclusions. Colored gemstone clarity scale. Of course other factors can impact a gem s appearance and structure most notably the cut. Gemstone grades and descriptions. View grade column for common quick reference grades used in the jewelry trade.
