You are right Kip in Fiestaware but there was a purple color as well. I do not know what the formula used was but it has a very distinctive purple color that looks metalic and like blue and purple iridescent glaze. Very unique for the period.

[img]https://cdn.shopify.com/s/files/1/0...icVessel_Purple_480x480.jpg?v=1659615234[/img]