Star K 8mm Round Solitaire Ring with Simulated Emerald Sterling Silver Metal: 925 Sterling Silver. Dimensions: Width: 10.00 mm Length: 10.00 mm This beautiful design is part of the exclusive Star K. Jewelry collection. Star K, is a reputable American Family Business based in New York since 1986, uses only the highest quality materials, and will proudly stand behind all of her products. Simulated Emerald: The Simulated Birthstone for May. From the French `esmeralde` meaning `green gem`. A symbol of immortality, it is said to improve memory, wisdom and intuition. To the Romans, emeralds symbolized nature and aid fertility. Additional Stones: