The difference between real tiffany glass and fake? What?

My husband has an old tiffany light but I don't think it is real it just made me wonder how can you tell?|||tiffany accessories. it really silver 锛?ring on the back of the internal 锛? tiiany will be co 锛?of 925 and the silver jewelry designer for the english name. if it's a fake. generally, only tiiany 锛?co 925, without printing the silver jewelry designer for the english name is tiffany . You can put you to buy a silver ornament tiffany get to tiffany store every inspection and are free .