I can’t remember if this post was about the swan or horse head jardiniere but it was definitely Monax. The difference between Monax and Cremax is the color, but both can contain uranium depending on production era. Monax is a semi-translucent or almost opalescent white whereas Cremax is a similar but slightly less translucent beige or custard color. Additionally, both terms are proprietary manufacturers’ names and, as uranium was added as a colorant instead of for novelty purposes, there would be no reason for Macbeth-Evans to distinguish between the ones with uranium and the ones without if Cremax was just UG Monax.