Genuine emeralds produce the purest vibrant green color and their value is primarily based on their color. Inclusions which are normally frowned upon in other gemstones are considered acceptable for natural emerald since its formation process almost always produces them.

Usually cut with facets, emerald has a high hardness rating of 7.5 to 8 out of 10. Emerald makes an excellent and vibrant choice to upgrade your USNA class ring.