Black opal is unique, each one containing its own combination of colors. This makes it one of the most unique center stone options for your class ring. Color variations may include: green, blue, yellow, red, and purple.

Black opals only come in a cabochon form, meaning they are polished and not facetted. Given the softness of opal, 5.5 to 6.5 out of 10, it's not recommended for daily wear and care should be taken when wearing. Those who choose this rare gem for their Class Ring Mod™ centerpiece do so for its colorful features and valuable one-of-a-kind uniqueness.