Topic: Blue molten lava like iridescent glass vase.

[brucebanner]

Looks like they are Kralik from the 1920's described as Lava decoration.

https://www.collectorsweekly.com/stories/106129-wilhelm-kralik--lava-application

A great find really chuffed.

[glassobsessed]

Never seen this style before, interesting items. They have a look similar to ancient buried glass, a date in the early 1920s would tie in with the fascination with the Tutankhamun excavations and things archaeological in general.

Sounds like Sue was right, given Jericho's description of how they were produced they will have been coloured with frit and afterwards acid was used to give the finish we see.