... jewelry, Glasses, Watches, Golf Club, Barrette, Button Walnut shellThe Walnut Shell Grain can be used in cleaning and blasting Molds, Apparatus ... , Plastics, Gold and silver jewelry, Glasses, Watches, Golf Club, Barrette, Buttons etc as blasting materials, polishing materials and also can be ... % Specific Gravity 1.28% PH Value 4 6% Abrasives Walnut shell