Genuine Emeralds produce the purest vibrant green color and their value is primarily based their color. Inclusions which are normally frowned upon in other gems are considered acceptable for Emerald since its formation process almost always produces them.
The Emerald has a high hardness rating of 7.5 to 8 out of 10. Usually cut with facets, an Emerald makes an excellent and vibrant choice to upgrade your class ring with.