This is a black Timascus disc plate. Timascus is a rare alloy made by layering and forging multiple titanium alloys, but black Timascus is a special titanium alloy containing zirconium. The diameter is approximately 32mm, the thickness is approximately 2.6mm, and the weight is approximately 10.4g. The wood grain pattern appears iridescent depending on how the light hits it. I think it can be used for pendants, knife parts, watch dials, etc. *Because the color is produced by heat treatment, the color tone may change due to polishing, cutting, or heating. Thank you.