I can tell the difference between glass and plastic., the thing is. I don't know if it is glass or crystal. Lead crystal what ever crystal. some of the items look like very old plastic . Since they were taken from an old Lamp. thanks for looking & bidden.
Glass is cold and heavy compared to plastic which is lighter and not so cold to the touch. It's hard to believe you can't tell the difference. Can you gently tap it on your front tooth cause that is a dead giveaway whether or not it is glass or plastic. you can tell.