This is known by collectors as tortoiseshell glass. This piece was made by Azzuro Maestri Vetrai (Azzuro Glass Masters) at Montelupo near Florence Italy in the 1970's . Super cool coloring on a heavy glass vase . This baby is 10 1/8 in. tall with a top rim of 4 1/4 in. Hand blown with a ground pontil . Perfect condition . No chips , cracks or repairs . Words fall short in describing this piece so I'll let the pictures do the talking .