I believe this is a R. Lalique perfume stopper. It came on a cruet which is also included in the sale, but I don't believe they are an original set. Both are frosted glass and look very nice together. Cruet has a swirling / iridescent pattern at certain angles. Cruet is approx 7 in tall & stopper top is approx 1 1/2 in wide. If anyone has more information on these items I would appreciate it. Good used condition, no chips or cracks. Questions and offers are always welcome. Purchased items are packaged with care.