Beautiful vintage blue butterfly lidded box/dish for jewelry

I picked this up at an estate sale because I fell in love with the gorgeous blue swirled material of this dish and lid with raised white butterflies. It's been sitting on my bureau, but I need to downsize, and I have too many small dishes/boxes on there. I'm not sure exactly what the material is, but it feels a bit like the material used in Wedgewood pieces and has some weight to it. 5"x5"x1.5" high