Vintage art Glass Dish

Hello I’ve just rediscovered this lovely glass dish , it’s like finding something new as it’s been so long that I’ve seen it I had forgotten about it. I don’t know anything about it, I would guess it’s Italian maybe? Looks more like a work of art than a actual dish, looks like it’s never been used , I’m wondering how old it is and where it’s from, I’m wondering if the person that made it is now dead and his or her works are now collectible