A Venetian Chalcedony flask, 17th Century. Photo courtesy Bonhams.

In marbled agate or Chalcedony glass in tones of green and brown, the hexagonal body moulded with six deep vertical flutes, a white metal mount at the neck, 17cm high. Sold for £16,875 (€20,083)

Provenance: Krug Collection
Lempertz, Cologne, 26-29 April 1961, lot 466 

Illustrated by Brigitte Klesse, Glassammlung Helfried Krug (1965), p.73, fig.85. A similar example in the Bayerisches Nationalmuseum, Munich is illustrated by Walther Bernt, Altes Glas, p.61 and by Rainer Rückert, p.247, fig.50 

Bonhams. FINE EUROPEAN CERAMICS, GLASS AND PAPERWEIGHTS. London, New Bond Street - www.bonhams.com