The Groove is an interesting little knife that I'll be sharpening to a real edge and be back to you on its performance characteristics. I did not order it from the above link because Knifeworks was out of stock and to be honest I got a much better deal elsewhere anyway. The green you see on the pic below is from my stropping the thing with chromium oxide. Embigination will bring it to a better light.
The black coating is what the industry refers to as DLC...Diamond Like Carbon...and in the case of the Groove, fortified with Tungsten which, next to depleted uranium, is the heaviest metal there is (1.67 times as dense as lead). There of course can be no Rockwell number associated with this process (even though certain manufacturers try to), as the Rockwell cone penetrates far deeper than any such coating as applied by modern man. Floridians who like knives soon discover that once out of the safe they turn into rusted relics, hence my taking a shine to blades designed for actual use. Amazing concept.
I could of course just get something in H1 steel, an alloy impervious to corrosion, but I don't like some of the other characteristics associated with this particular process. My knives eventually get a 30 degree inclusive edge and only certain steels can take and hold such a grind. For references purposes, a surgeons scalpel is ground to an 18 degree inclusive edge, but they're nothing more than disposable razor blades with a different shape. A thin edge is not necessarily indicative of a good cutter, though, as cheap steels, like a surgeon's scalpel, will soon begin to micro-fracture and then become jagged remnants of their former selves.