I cannot see a manufacturer mark! However, this is what Grok sees. This appears to be a vintage costume jewelry frog brooch/pendant (convertible pin) from the 1960s–1970s, a very common style in mid-century figural animal jewelry.** The emerald green rhinestone eyes, gold-tone metal (often with some enamel or textured details), and loop (bail) for wearing as a pendant or hanging are classic features of these pieces. ### Manufacturer Most examples like yours are **unsigned** (no maker's mark visible under the magnet or on the loop). Grok seems to think this is a Hilco piece. I cannot find a maker mark. This is a fun, whimsical piece consistent with 1960s - 1970s organic motifs.
eBay