If this has silver aventurine inclusions, it could be from the same factory that produced this item:
(http://www.encill.abelalways.co.uk/ebay/arte-murano1.jpg)
(http://www.encill.abelalways.co.uk/ebay/arte-murano2.jpg)
The label (a little worn) reads: ARTE MURANO - LINEA MARY
Quite 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