Emeralds are much more rare than diamonds. Because they are brittle and included they are more expensive when they are clear. And stunning.
Cate Blanchett wearing Lorraine Schwartz emerald and diamond earrings
18th century gold and emerald cut emerald earrings
Angelina Jolie wearing giant emeralds also by Lorraine Schwartz
cabochon emerald ring
polished emerald nuggets and diamond necklace