Har-Tru Green Clay is the world’s leading clay court surface. It is made from bilion-year-old Pre-Cambrian metabasalt found in the Blue Ridge Mountains of Virginia. It is a natural green stone that is extremely hard and angular – two very important qualities when it comes to tennis court construction. The angularity helps the stone particles lock together to form a stable playing surface. The hardness provides exceptional durability. The natural green color is classically clay and instantly recognizable. The stone is crushed, screened and mixed in the precise portions necessary to produce a stable playing surface. It is then installed over a porous base of crushed stone aggregate to produce the final product. Har-Tru court surfaces are only available through licensed contractors and distributors like Bishops Tennis. Feel free to give us a call for a quote at 703-661-8000.