Art Nouveau iridescent mother of pearl glass vase

This small Art Nouveau iridescent glass vase is one of an eclectic trove of new acquisitions. This was a reasonably priced buy it now on eBay AU.
With a simple, squat, bulbous form, it is made from what appears to be two layers of cased glass - clear over a pearly opaline interior. Measuring 10 cm tall, 11.5 cm across the wavy, three way crimped top rim, & 7.3 cm across the base, it has a neatly polished out pontil mark.
There is a similarity in colour to Kralik's mother of pearl glass.