Colleen’s of Medford Square is hosting a pop-shop featuring permanent jewelry by Spark by Simone. Spark founder Simone, the owner of a barre studio in Brookline, has been bringing curating thoughtful and memorable experiences for over 10 years. Permanent jewelry is a custom-fit piece that is welded on and is worn continuously for a low maintenance, high vibe look. Pieces can 14 karat, gold filled, or sterling silver.