Recommended … Genuine Arkansas Black Surgical (Ultra Fine) Pocket Knife Sharpening Stone Whetstone 3" X 1" X 1/4" in Leather Pouch Bap-13A-L 4.6 out of 5 stars 239 $20.99 $ 20 . Arkansas stones are quarried from from geological formations of Novaculite. 3 inches long. The Hard Black Arkansas Pocket Stones … 99 Having a sharpening stone close at hand is often the key to having a sharp tool. This 1/2" THICK Black Novaculite Sharpening Stone is the REAL McCoy! This is the Genuine Arkansas Black Novaculite Whetstone mined ONLY from the Ouachita Mountain region of Central Arkansas. The unique crystalline structure of the quartz gives Arkansas stones … Halls Arkansas Surgical Black Pocket Whetstone, Extra Fine This extra fine, surgical grade pocket sharpening whetstone is made of natural Arkansas Novaculite stone. They work well as a finishing grit or for light touch ups. Novaculite is a rock composed of microcrystalline quartz. This rare stone … These Hard Black Arkansas stones are very fine stones. Arkansas sharpening stones will sharpen all knives and tools and are the most popular sharpening stone worldwide. Genuine Arkansas Black Surgical (Ultra Fine) Slip Stone Whetstone for Sharpening Carving Tools 4" X 1 5/8" with 1/8" and 5/16" Radius BAS-14-P 4.8 out of 5 stars 42 $29.89 This is the finest knife sharpening material in the World.