Platinum Series

Nubatama Platinum Series waterstones deliver maximum abrasion resistance and density, specifically engineered to cut ultra-tough, high-vanadium powdered steels without glazing. Formulated with a significantly harder matrix than the tactile Ume line and a denser structure than the fast splash-and-go Bamboo series, Platinum stones hold their surface flatness under intense point pressure while generating an ultra-refined finish. Every stone in this collection originates directly from the authentic Ken Schwartz Estate.