I have a lot of interest for these materials which are not often used, such as Tantalum and now, Cermet.
Tantalum and Cermet have one point in common, the grey aspect. Blueish with Tantalum, it seems a bit darker on Cermet.
Happy to read that it is resistant to scratches, as the bezel of the RO, hence the ROO, is a scratch magnet.
Best, and thanks for this good article, Michael.
Nicolas.