Rock Tumbling Tumbling away, Dallasite out of the rotaries and into the vibe by Stewart Burnett • September 10, 2014 • 1 Comment I’ve just been tumbling away over here. I took my 24 lbs of Dallasite out of my rotary tumblers after about 10 days in coarse grind and put a different batch of Dallasite in my vibratory tumbler on final polish. Read more →