Newport Sand and Gravel is a mining producer of Smoky Mountain and Cumberland Mountain rustic, decorative stone products. We will work hard to earn your respect and exceed all your expectations. Our products are available either bulk or by pallet. NSG Stone is the preferred source for landscape materials. We offer river stone, sand, mountain and river boulders, and flag stone.. River Stone,Pea Gravel,Hand Stacked Pallets,River Boulders,Mountain Stone,Mountain Boulders,Flagstone,Sand,Landscape Materials,Special Projects. Products available bulk or by pallet.