18G Nose straight stud with birthstone color gem which is bezel set. Gauge: 18G Length: 6mm - 1/4" Gem is 2.5mm Stainless Steel Color: Clear If you have had a reaction to a material in the past, we do not recommend ordering or wearing any jewelry made with that material as it could cause a reaction. All jewelry should be removed when showering or swimming as harsh chemicals such as abrasive soaps, shampoos, chlorine, etc., may cause damage to the jewelry. Always clean your jewelry with a gentle soap and rinse thoroughly. Wipe dry with soft cloth before wearing.