Estate sale pick up from consignment client. I do not have information on the materials, test materials or clean the jewelry. I leave it this up to the buyer. All items from the estate have been stored for a long time and may/will need cleaning and are not in perfect condition. Some may be missing pieces, or parts. Some are vintage and some are costume. What you see is what you get. I took multiple pictures and video on all jewelry. Sold as is, with no returns. That being said some great finds!