About 14k gold filled
It is a great alternative to solid gold cost wise. It has 5% layer of gold bonded and mixed to a base metal which is equivalent to 100% more than gold plated. It's more valuable, tarnish resistant, long lasting, won't rub off, perfect for sensitive skin and with proper care it can last a lifetime.
It can be use in the water. Tarnish resistant and has a lasting quality. But if you want to maintain the luster of the gold/silver keep it dry. Do not spray perfume, hairspray, or any other type of chemical contained products that can damage your jewelry overtime.
* For super extra care; once in awhile you may clean it with mild soap in warm water using a soft toothbrush and towel to dry.
* Store your jewelry inside the pouch or zip lock airtight bag that comes with it to avoid scratches and getting your precious sparklers dirty. Wipe crystals with soft cloth.