Crucible Steel ?

[Rick]

Jens,
I shot the picture last night under artificial lighting , as a result the red shift was uncorrectable so I removed the color .

Tom,
Yes the blade seems to have had a strong etch in the past but when I received it there was no perceptible color difference .
There are other areas along the edge that look homogenous , most of this pattern is away from the edge nearer the spine .

Here's one shot in daylight .