Vibra-Dry + (R) polish mix, 50,000 is a polishing compound that is highly recommended for an even greater polish using a vibratory tumbler for your tumbled stones, cabochons, and most metal such as coins, jewelry pieces, castings, etc. Vibra-Dry + is not recommended for use in a rotary or barrel tumbler. An order of one is for one pound. For most stones such as agate and jasper, use the silicon carbide grit sequences 60/90, 150/220, 500-600F, Aluminum oxide 800 Pre-polish. For a better shine, continue the process useing a vibratory tumbler and Vibra-Dry +Mix. Should you want to try some of the other mixes, give us a call or e-mail. Vibra-Dry + Mix is available in the following grits: 600, 1700, 3000, 8,000, 14,000, 25,000, 50,000, 75,000, and 100,000. Diamond Pacific Tool Corporation recommends the following as a guideline for the Vibra-Dry + Mix polishing compound: Soft stones, 2-4 on the MOH scale such as amber, coral, pearl, etc.: 600-3000, 25,000, 50,000. Soft-Medium:-5 MOH scale (Apache tears, glass, shell, etc.) 3000-25,000, 50,000. Medium:5-6 MOH scale (Jade, opal, turquoise, etc.) 3,000-14,000, 25,000, 50,000. Hard:7-8 MOH scale (agate, jasper, topaz, etc.) 14,000, 25,000, 50,000. All stones & metals for super polish: 75,000 and 100,000. Please note in the past a small package of steel shot had been part of the process with Vibra-Dry, but the company and customers discovered the steel shot is not needed. The Vibra-Dry works just fine without steel shot.