Toishi Diamond Sintered Stones

Toishi Diamond Sintered Stones are precision sharpening and polishing stones made in Japan, designed for the demanding needs of professional jewelers, engravers, and metalsmiths. Each stone features a 1 mm deep sintered diamond surface that delivers consistent cutting action for shaping and final polishing of carbide gravers and other steel tools. The sintered construction ensures the diamond layer is durable and long-lasting, maintaining its abrasive integrity through repeated use.

Available in two grits — 3000 and 6000 — these stones address both intermediate refinement and final polishing stages. The compact form factor makes them easy to control when working on small, detailed tool surfaces, such as graver tips and carbide cutting edges.

Features

• Sintered diamond surface — 1 mm deep for durability and consistent abrasion
• Ideal for shaping and polishing carbide gravers and steel tools
• Available in 3000 grit (fine) and 6000 grit (ultra-fine) for progressive polishing
• Compact size for precise, controlled hand use
• Made in Japan for professional-grade quality

Specifications

Available Options