The birthstone for May is the Emerald. Ancient history says emeralds bring good luck and good health. The green of an emerald represents life and springtime. Fine quality emeralds are more valuable than diamonds. Emeralds tend to have tiny cracks or cavities called inclusions. These inclusions are acceptable even in top quality emeralds, but they make the emerald soft and somewhat fragile. For this reason care should be taken when wearing emeralds especially with a ring.  Emerald rings should not be worn everyday.