This is a French white opaline art glass vase with blue glass overlay. The glassmaker is Saint Louis, or St. Louis. The date is the first half of the 19th century, circa 1844 to 1848.
I refer you to a photo I took from the book “Saint Louis From Glass to Crystal from 1586 to Today” by Gerard Ingold, on page 47, Items 48 and 49, and this photo is perhaps the 2nd or 3rd photo down when you scroll through the photos. Here is shown the glass produced by Saint Louis from 1844 to 1848 that is white opaline with a blue glass overlay – exceptionally beautiful.
The vase is 9 ½” high and 5” wide at the belly.
The white glass vase has a blue bottom and blue around the rim. The white shows age with yellow stain in the interior mouth from use, and I show the yellow stain in a close-up photo.
The white glass has a brownish hue to it in dim light; in other words the glass is not pure white and I don't know if the glass was produced this way or if the color changed due to aging.
There are no chips, cracks or nicks. You can see your hand through the glass when holding the vase.
The bottom has a round indented polished pontil. Around the pontil the glass is scored in evenly spaced cuts, just what the glassmaker did back then. The bottom shows a lot of age wear due to shelf sitting, with scratches.
There is a small air bubble in the interior mouth.
It is a beautiful vase and quite rare. I’ve seen similar glass by Saint Louis over the years, but smaller pieces, and for some reason the antique dealer never identifies it correctly, plus there is usually damage.