Vintage Art Deco Large Star Shot "Gold" Ring

Vintage ring is in Excellent condition, unsure if this was previously worn, does have minor surface scratches and pitting due to age and storage. Ring is stunning in person. Features a flat top star shot design, which dances in the sunlight, wrapped in gold toned filigree. Ring is adjustable in side, see photos. Costume jewelry, brand and designer unknown Measures 1" end to end approx. with a 5/8" flat top approx. I don't know much else about this ring other than it was purchased by my grandma and found prior to her estate sale. Questions? Please ask prior to purchase.