Associated with the month of September, the beautiful sapphire crystal featured in this nose stud makes it a wonderful birthday gift for anyone born in September. This nose stud is made from 9ct yellow gold stamped with a 375 metal mark and has a pin width of 1mm. It measures 8mm from front to back while the crystal itself is 3.5mm in size. With a weight of just 0.12 grams, a 7mm Andralok back secures the nose stud in place.