Lot of 11 Vintage Adjustable Mood Rings never used 1970's Never worn in Case from an old Hardware Store Ive only seen them change under hot water and then put into Refrigerator On my hand they dont seem to change much, Kind of a Blue, clear and Green Tint in extreme temperature change Unsure if they are working correctly as im not that familiar with them I see the bring aroung $12.95 each Buy my lot cheaper, You get all 11 for my Price