Portieux-Vallerysthal - Vase - Opalescent Glass

An exceptional vase made of opalescent glass in a rare, milky-blue shade. It is a beautiful example of decorative glass from the transitional period circa 1890–1920.
Features and Craftsmanship

Material (Opalescent Glass):
The glass is milky and semi-translucent, characterized by a natural opalescent glow. In transmitted light, the edges and thicker areas take on an intensified milky-blue hue, achieved by adding calcium phosphate to the glass mixture.

The vase features a slender neck and a rounded, bulbous body. Its lower section is decorated with a distinctive raised Hobnail/Raspberry pattern, reminiscent of raspberries or blackberries, while the widely flared, wavy rim is a hallmark of Art Nouveau and late Victorian trumpet-shaped vases.

Origin and Dating
Portieux-Vallerysthal (PV) – one of the oldest and most renowned French producers of opalescent and coloured pressed glass.
Estimated production period: circa 1890–1920.
Technical Details
Style: Early Art Nouveau
Origin: France
Manufacturer: Portieux-Vallerysthal (PV)
Height: 16 cm
Top diameter (rim to rim): 8 cm
Body diameter (widest point): 7.5 cm
Base diameter: 5 cm

Condition
Very good vintage condition.
No major cracks. Due to age and the pressed-glass manufacturing process, minor irregularities are possible: tiny nicks or roughness on the thin, crimped rim, as well as subtle tool marks on the underside. The vase displays a beautiful, strong opalescence.

This vase is perfect for collectors of antique opalescent glass, lovers of Art Nouveau and Victorian decorative arts, and anyone seeking a unique, atmospheric accent piece for an elegant interior.