This Shobudani Iromono Tomo Nagura is very colorful and quite soft. Used mostly for finishing cutlery, it’s also excellent for mid-range razor honing.
The view above shows a 1.0 mm corner of the Tomo.
Objective – Neo Splan 5x
Relay Lens – 2.5x
Illumination – Darkfield Off-Axis Fiber-Optic
Below, a darkfield image with a reference scale - each bar is approx. 10µm.
Next - same image without the scale.