For those who asked, here is the source for the Holy Cow polish,
which I had great success using on zoisite. It won’t cut enough to
polish the ruby, but the zoisite wouldn’t take a glass polish with
anything else I tried. I’ve personally tried it on everything I’ve
cabbed, including jaspers and opal Koroit, and it works better than
cerium oxide: Guy Clark, clarksrock@aol.com, 24195 US Hwy. 19N #123,
Clearwater, FL 33763, Phone after 6PM: 727-796-033020
Cathy Flory
Owner/Designer
JEWELWORKS
http://www.jewel-works.com