ornamental

alluring, appealing, attractive, charming, delightful, glamorous (also glamourous), pleasing, prepossessing

beauteous, beautiful, bonny (also bonnie) [chiefly British], comely, fair, gorgeous, handsome, lovely, pretty, stunning

detailed, elaborate, fancy, ornate

bijouterie, bric-a-brac, gimcrackery, trinketry, trumpery, virtu (or vertu)

bagatelle, trifle

figurine, objet dʼart (also objet), ornament

keepsake, memento, souvenir

conversation piece

collectible (or collectable), collector's item