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