His is such a fun piece. After some extensive research I found out it is a book piece from Marcia Brown's book "Unsigned Beauties of Costume Jewelry".
Before creating his own designs under his company brand name Dominique in the 1990s, he was a jewelry maker for other jewelry brands such a Weiss and Eisenberg Ice. His earlier pieces are often unsigned.
His Dominique branded pieces were made mostly for friends and family that visited his home and were not marked until the mid 1990s. This dog brooch is one of the pieces he made working for another jewelry brand. I do not know the brand he designed and made this for but this piece/style is attributed as his work.He also made a Santa Claus brooch utilizing the shaggy chain style for Santa's beard. His earlier unsigned pieces are quite rare, sought after, and valuable.
Style/Theme: Hand Crafted Figural Spaghetti Chain Terrier Shaggy Dog. Material: Prong Set Faceted Round Glass Rhinestones & Metal of Unknown Properties. Colors: Black & Topaz Colored Rhinestones & Bronze Tone Metal.
Size Measurements: 3.25" L x 3 3/8" W x 1 D. Condition: Pre-owned used vintage condition. All rhinestones intact, original, & secure in prong settings.
Safety clasp working & secure. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Brooches & Pins". The seller is "michmur-9" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, Korea, South, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Croatia, Republic of, Malaysia, Chile, Colombia, Costa Rica, Panama, Trinidad and Tobago, Guatemala, Honduras, Jamaica, Antigua and Barbuda, Aruba, Belize, Dominica, Grenada, Saint Kitts-Nevis, Saint Lucia, Montserrat, Turks and Caicos Islands, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.