18k Gold Over Sterling Silver Purple Drusy and Multi-Stone Pendant Necklace , 18" Amazon Curated Collection. $65.00. Made in China. Gold over sterling silver with shimmering purple drusy and multi-stone pendant. No ultrasonic cleaning. No abrasive cleansers. No heat. Crystals will chip off the drusy. Gemstones may have been treated to improve their appearance or durability and may require special care.. Save 41% Off!