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It's not bad but technique is an issue. It does require a lot of slurry and a very light touch. It's not as consistent as the Escher on the polish. It's not as forgiving as the Escher on technique...

That's OK. It's still got the woodgrained appearance. I don't care for the stratifed variant anyway.

That's just another variant with ferrous strata. It's a stone, not a production line of identical pieces.

An example of the rarest (figured) coticule Howard refers to:

http://www.upaboveit.com/images/misc/razors/hone/coticule/1/eRIMG0155.jpg
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