Arkansas stone is a fine grade white/gery stone used for sharpening tools comes from USA. 

This is HARD Arkansas stone comes in plastic tube

Used to sharpen blades, knives, gravers, scorpers,

Grade: HARD

Dimensions: Length = 3"

Width = 1"

Depth = 1/4"

The Arkansas sharpening stone is rated number one by engravers, stone setters, watch and clock makers, light engineers and wood workers to name just a few craftspeople who use these stones. Arkansas sharpening stones are suitable for sharpening all tool steel metals and are the most popular sharpening stone used worldwide.

Arkansas stones are quarried from geological formations of Novaculite and are composed of microcrystalline quartz. The unique crystalline structure of the quartz gives Arkansas stones their superior honing abilities. Whether its gemstone setting, watch and clock making or creating an engraving masterpiece, Arkansas stones will provide the perfect cutting edge.

They are the best quality form of oil stone and will last longer.

Arkansas stones should be lubricated with oil before use for a quicker cutting action and minimal loading of the stone. After use wipe stone clean & cover to protect surface.