This rectangular handblown Dusk art glass studio vase was designed by Nils Landberg for Orrefors Sweden in the 1950s. It features deep grey glass suspended inside a bed of clear glass. It is part of the Sommerso (dusk) collection. The color of the inside glass, depending on the source of light, turns from graphite grey to dark green. The glass is very thick and the piece is heavy for its size. It is engraved on the bottom.