Just before reading your post, I put down a book entitled "How To
Tumble Polish Rocks into Gems" the Author is Edward Smith. He is
listed as the inventor of Vibra-Dry Compounds, as well as viking
Vibra Sonic and Mini-Sonic tumblers.
I met this gent several year ago demonstrating at Diamond Pacific's
Tent in Tucson or Quartzsite. I recently saw Bill Depue of Diamond
Pacific with a Vibratory Tumbler going with the Vibra-Dry as the
medium polishing up copper pennys.
That reminded me I had bought some when I met Ed Smith.
I have just tumbled some slabs and stones with silicon grit and am
preparing to pre polish and polish them. Decided to read this book
and found that the Vibra-Dry is just what i will do. I will also
tumble in this manner finished and dulled pieces of personal
Makes me think this would be perfect for your grandmother's beads. I
may even try with my mother's cherry Amber facet beads. Just bring a
bit of life into them.
Diamond Pacific carries the book and the Vibra-Dry. They have an 800
phone number, unfortunately I do not have it right on hand.