Dear All,
Opaline. 20 " tall, 5 3/4" at mouth 5 1/2 " at base. Two piece, base to 5 1/2" Trumpet 14 1/2". Tall and slender. Enameled flowers spiraling up the vase. Gilding to base and rim.
So as before my first thoughts are Victorian; then French, Stourbridge, or Moser/Bohemian.
Flowers are often a give away; to those horticulturally minded.
I have seen similar decoration on Baccarat piece ( see below

... I wished ) however they had a whiter opaline.
http://www.onlinegalleries.com/art-and-antiques/detail/a-fine-pair-of-parcel-gilt-opaline-glass-vases/175723So am I heading in the right direction?
With Kind Regards
Andrew