The color is a criterion that is worth looking at differentiated, especially with the sapphire, because this knowledge is important when buying a sapphire. The color, however, has a great influence on the quality determination, the value due to its rarity, and the beauty in the eye of the beholder. However, to put a percentage is not enough, it is an interaction of the 5 quality criteria. One often reads that the color determines 70% of its value compared to the importance of location in real estate. Unlike the universal grading system for diamonds, in the case of a colored gemstone such as sapphire, color is a determining factor.
When evaluating and buying a sapphire, the most important aspects are not only the 4Cs, but also the 'Country of Origin' of the gemstone, so it would be more accurate to say the 5Cs. The color, the carat weight, the cut, and the clarity together form decisive factors in the quality and therefore the value of a sapphire.
For gemstones, the 4C's for determining quality is derived and modified from the evaluation of diamonds.
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