Don't judge untill you see mine.
We've made tons of them. I was not happy with the esthetics untill recently.
Plenty of trans.
Polished Zirconia is less abrasive than porc. Slick like a glass mirror. Never degrades into sandpaper over time, like porc does.
Looks like a ceramic metal chrome finish. Kinda like mother-of pearl.
I will bet anything it is more transparent than eMax.
Send me a .5 or 1mm slice of your best eMax, and I'll throw it against my Zirconia on my light table and snap a pic.
Just cut some base-plate wax into a square or rectangle and press it.
Try to get it .05 or 1mm for an accurate comtest.