3.25 Cts of 7 mm AA Round Synthetic Ruby Stud Earrings in 14K Yellow Gold-Screw Backs Great anniversary or birthday gift. The studs have a fine AA quality round Synthetic Ruby each prong set in 14K Yellow Gold. Synthetic gemstones are developed in the lab creating the same pressure and temperature, these stones have the same chemical, physical, and optical properties as natural gemstones. 30 Day No questions asked Return Policy Free-Shipping within US July Birthstone/Anniversary/Birthday Gift