Now that I have more than a few rings to show for my efforts, I am announcing that Cobalt is now a metal option for my wood rings.  It joins Titanium, Black Zirconium, and Damascus Steel as options for outer liners for wood rings. Cobalt has a few desirable features: it is more scratch resistant than Titanium, its color is permanent and not an oxide layer (like Zr), and it is the color of white gold (though several times stronger).  Here are a few of the practically infinite options:

To see the many style and options for wooden wedding bands, take a look at my shop.