Just tidying up some blasts from the past (including some very ancient ones), largely for the benefit of anyone searching the site for information.
The mark is for Tanya Creations, founded in 1978 and one of the leading designers, manufacturers and distributors of private label jewellery. Based in East Providence, Rhode Island and still in business today as a division of Unique Designs, Inc. The brooch isn’t part of their current range.