If this has silver aventurine inclusions, it could be from the same factory that produced this item:
The label (a little worn) reads:
ARTE MURANO - LINEA MARYQuite small for Murano: only 9.5cm tall, but quite heavy and it has a rough, unfinished pontil - something else that's not normal for Murano.
Ray, I might be interested in this, so let me know.
Regards,
David