Each of these bags is batch-numbered and time-stamped, this is an impressive product-tracking effort by US Silica. It appears the time changes once per minute and from our calculation, their plant was producing about 600 bags/hour. They stack silica 60 bags on a pallet, 3000 lbs! The only material we receive that is stacked more densely than that is plaster, 80 bags per pallet at 4000 lbs. We stack our clay at 40 boxes/pallet giving 1760 lbs.
Silica, sold as a white powder, is pure quartz mineral. Quartz is pure SiO2 silicon dioxide. It is the most abundant mineral on earth and most used in ceramics.