Washita stones consist of silica

In Gunny Glide

Extended Angle Body: Allows a sharpening angle of up to 35°

It is available in two sizes: 10" or 12" (length of the ceramic part) and two colors (beige or black handle)

To be used with water

spyderco ceramic stone for edge pro Grit:Fine Washita stones consist of silicaSpyderco Ceramic Stones are used for sharpening knives on Hapstone and Edge Pro knife sharpeners. Spyderco stones are made of alumina ceramic with an extremely high hardness rating. Spyderco Ceramic scarcely wears over time. Spyderco Ceramic Stones are available in Medium (estimated 600 JIS), Fine (estimated 2000 JIS) and Ultra Fine (estimated 5000 JIS) grits. Spyderco Ceramic is preliminarily lapped and does not require lapping after purchase.