the arms are glass, the bobeches could be cut crystal, the rosettes could be either the crystals are likely real but I would have to see the facets in the light. The problem is it looks to have been painted and there is no aging on the brass wires that hold the crystal on so this fixture could have been worked on and had elements replaced over the years. Or because it is painted over being brass it could be mostly glass. I will say the tear drop crystals do appear to be that.