... different drilling processes, including but not limited to diamond core drill, wire-line core drill, specifications as shown below: Hot-Pressed Diamond ... , Quartzite Siliceous Tuff Lava Gravel.115-8, 8-10, 10, 15, 22-25Tuff, Tuff Fused Quartz Chert, Dacite, etc125-8, 8-10, 10-15, 22-25Quartz Chert, Chalcedony ...