following shortly are some representative samples of this and other productivity spates , reaching into the foreseeable past , altering the invisible present and encapsulating the improbable future ; and endless , limitless future made entirely by crushing exquisite , priceless , oceanic shoreline gemstones , pulverizing them into bits of colored broken glass , turning them into billions of grains of ordinary brown beach sand , but never around when seen close-up , filtered through your hands .