Quote Originally Posted by hi_bud_gl View Post
I will try to make this simple.
Water is H20
doesn't matter where or how you get water -it will be H20.
Now you could join salt etc and by doing so you can change weight, consistency etc but water will be same H20 .Will never ever change.
hope this helps.

CR2O3 doesn't matter where or how and when you get CR2O3 you should end up CR203. You can add different ingredients and change weight etc.
Hmm, Oxygen is O2 but there's O3 and O5 too. And what about heavy water?

The ore for chrome is Chromite which is Cr2O4 with added iron and magnesium depending on purity.

Most chrome oxide is made for lapidary work so it can be ground to different grits according to need no different than alumina is.

I don't see any reason why the formula can't be artificially adjusted no different than iron oxide has several variants as long as the compound is stable and will bond together.