Pair of black and opaline multilayer glass vases. 1970s.

Pair of multilayer glass vases, black exterior with cut areas revealing clear glass and an opalescent interior. Relief work with steps, marked geometric lines, deep and contrasting effect. Thick glass (0.5 cm) and heavy (over 2.2 kg per piece) with excellent craftsmanship. Very good condition, without chips or cracks.