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...

A Venetian Chalcedony trembleuse beaker and stand, first half 18th century. Photo courtesy Bonhams. The glass marbled in tones of brown and green, the beaker with aventurine inclusions and of footed trumpet form, the stand with a deep central well and...