Murano "avventurina" glass champagne bucket with clear glass handles and base, signed Constantini Murano. AVVENTURINA: Clear glass with 23-karat gold flecks, creating a shimmery, metallic look. The process was aptly named, as it means "adventure," describing the difficulty of working with this process. Base is 5.875" in diameter. Two vases are available, priced per piece.