It could be a Dalmore Blue, they have a blue/green line pattern and may be that coarse. I was already looking at them yesterday, but was still leaning more towards Thuringian because it seemed so smooth.
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One of them has the swirls and streaks that a charnley forest of mine had - darker variety without the flashy red spots and swirls.
Regards,
Neil
OK, two more pics then I'm done... I won't be able to goof with these stones until saturday at the soonest. I doubt they will help anyone ID it, but, meh, I'm sure you guys don't mind lots of pics.
This is Unknown #1 in direct sunlight. I lapped both sides of the stone.
http://www.adrian.edu/%7Ebmaggard/590.JPG
http://www.adrian.edu/%7Ebmaggard/591.JPG
If i am not mistaken above stone is a course stone. it looks like Dalmore Blue but not CF
.IF you pay attention to chips you will see it does look like course.(all this from seeing from the pictures) i may be wrong .
It may be a Dalmore Blue but if it is the figuring is much lighter than that found in my copy. It does resemble a Charnley that I had for a time without the purple bits.
The long edges of all the larger, labeled Escher type stones that I have seen have rather deep striations that are diagonal and slightly curved. These no doubt were caused by the saw used to cut these stones. I don't see evidence of these striations in the photos that you published. Of course, it is possible that the edges were lapped, however it's been my evperience that this would be unusual.