description:The Mark Robbins double stud is Nickho Rey's version of your everyday stud. Each colour is made with different crystal shapes. From day to night, occasion to everyday, this stud packs an interesting sprinkle of sparkle. fabric:White Rhodium VermeilClear Crystals Nickho Rey Jewelry has a base metal of 925 Sterling Silver and is plated in either 14K Gold, Rose Gold, or White Rhodium. To ensure the piece, plated jewelry should not be worn while swimming, bathing, exercising, or when applying perfumes, lotions, or hair products. To clean your plated jewelry, use a soft cloth and gently wipe (do not buff) the surface. It is ok to clean with jewelry cleaner and dried thoroughly thereafter. When not wearing your piece, it is best to store it in the provided pouch. measurements:Length: 12.7mm