A very fine French PV Portieux Vallerysthal blue opaline glass vanity or dresser set dated from the late 19th or early 20th century. Includes three vanity bottles with spherical stoppers and intricate gilt decor with floral motifs, a round lidded box, and five vanity trays. Bears some auction paper labels and marks on the bottoms. The first objects in opaline glass were made in Murano in the sixteenth century, with the addition of calcium phosphate, resulting from the calcination of the bones. The technique did not remain secret and was copied in Germany, where this glass was known as bein glass. Opaline glass was produced in large quantities in France in the nineteenth century and reached the apex of diffusion and popularity during the empire of Napoleon III. French Glassware, Home Decor Antiques And Collectibles.