This pair of vases is a superlative example of "Camphor" glass, a specialized form of frosted opaline produced by the renowned French firm Portieux Vallerysthal. Unlike standard American satin glass, French Camphor glass is characterized by a heavier lead content and a deep, multi-stage acid etching process that results in a luminous, ice-like quality. The pattern, often identified as "Pivoine" (Peony), features a central floral head rendered in high relief, surrounded by theatrical Art Nouveau scrollwork that integrates seamlessly into the body's architecture.The manufacturing of these pieces involved sophisticated mold-blowing techniques followed by hand-finishing the ruffled, "Jack-in-the-pulpit" style rims. The density of the glass allows for incredibly crisp detail in the molded petals and flowing acanthus-style scrolls, which provide a tactile, sculptural presence. While one vase remains in excellent condition, the second vase shows a clear fracture and loss along the inner rim edge—a common occurrence in these delicate ruffled forms, but one that does not detract from the pair's significant historical value or their ability to diffuse light with an ethereal, 19th-century glow.