When Halle Berry arrived at the London premiere of her new film “Crime 101” in January, red carpet watchers praised the 59-year-old Oscar winner’s bejeweled skirt and plunging V-neck bodysuit, worn with a striking silver pendant. But few noted the stunning vintage sparkler she had on her ring finger.  It wasn’t until Berry appeared on “The Tonight Show Starring Jimmy Fallon” in February that fans realized that the funky Deco-style bauble she had been sporting for the past month was actually an engagement ring. The confusion was understandable. The ring — which dates back to the late 1940s to early 1950s — does not look like your typical engagement ring. Given by Berry’s longtime beau, musician Van Hunt, it features a round center diamond surrounded by a geometric grid of square-cut sapphires, set in yellow gold. Halle Berry’s engagement ring is a vintage marvel set with sapphires and a center diamond. Brianna Bryson/WireImage, Axelle/Bauer-Griffin/FilmMagic It was like a fashion-forward work of art.…