Regal Iris Lamp
This Gone-with-the-Wind style lamp in aqua opal sold in 2017 for $1,100. Another sold the same year for $650.

A red example sold in 2010 for $375 and another in 2014 for $225. I have no idea who made it, although Fenton would be a guess. However, I've not been able to find it in my Fenton reference material.

In 2018, a Regal Iris lamp in aqua opal, listed as Levay, sold for $400.

Updated 7/9/2018