For a piece like that, the first names that spring to my mind are Bayel, Vannes, and COFRAC Art Verrier. However, I have not been able to find a mark like yours for any of those makers. You might find one that has been identified if you google images for "free form crystal centrepiece" and "free form crystal bowl". The centrepieces are very big. It can really help if you give measurements when posting.
look forward to hearing what you find out.