I just got this in the mail today and can't wait to show it off! It is cut glass, very heavy, and is two layers of glass. the outside layer is blue, the inside gather is vaseline/uranium glass. The piece has a high lead content and is cut glass. There is a nice polished pontil on the bottom, and good honest wear on the foot. Anyone recogize the cutting, style or maker? It was sold to me as Czech, about 1920, unknown maker. I got it from great-glass.co.uk
It is 17cm across the top, and just over 12cm tall. The photos clearly show the internal gather of uranium glass, but due to the blue outer layer, it is tough to see any yellow, as the blue spectrum washes out the yellow. you can only see the yellow at the very narrow portion, just above the foot in normal room light.
here is the link:
http://www.vaselineglass.org/BLUECZECH.JPGRegards
Mr. Vaseline Glass