In other words, each gemstone on the scale can scratch the ones below it. The Mohs scale is an index of the “hardness” of each gemstone. For example, Sapphires and rubies are among the hardest gemstones, with a Mohs scale hardness index of 9 (out of 10). Why is that the case?Įmeralds, Sapphires, and Rubies (the “big 3”) are generally considered precious gemstones whereas most other gemstones are considered semi-precious. In fact, a very high quality emerald, sapphire or ruby can be even more expensive per carat than a diamond. Precious Genuine Emeralds, Sapphires, and Rubies tend to be more expensive than other gemstones, like amethyst, garnet, citrine, etc.
Antique-Style Emerald Bridal Wedding Ring Set
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