Thread: Mystery yellow green hone

Hi guys,
I just picked up off a new hone the auction site. The seller suspects this is a very fine green slate of some description. Initially was thinking/hoping a yellow-green thuringian, but not so sure.
Any idea what this is?







Thanks,
Bob

Doesn't look like a y/g thuringian to me. Without having handled it/seen it I'd guess the seller was right at initial evaluation

Does not appear to be a thuringian to me either

Is it very very hard? Could be a translucent Arkansas stone that needs to be cleaned ?

Nice measuring stick. Looks like oil was used, coming out of the pores and corner as shown. Looks light grey, light blue from my screen's color balance. Doesn't look like an Arkansas as far as I can tell. I'm going to go out on a limb and suggest something in the Charnwood direction.

Thanks for your help guys.
The hone arrived yesterday. Took some photos after a bunch of cleaning and lapping.

Some conclusions: this is a very hard stone. Even after lapping on 80 grit w/d, the stone remained pretty smooth and glassy. This is by far the hardest stone I've ever owned. It chews up low grit w/d like candy.
It's also a very dense stone, I've calculated the density at 2776 kg/m3 (which should represent a specific gravity of 2.77, if I'm not mistaken). The particulars of the stone are: 34mm x 59mm x 177mm and weighs 986 grams.

Not owning any novaculite based stones, it's impossible for me to determine whether this is an Arkansas, CF, Turkey, etc.
Arkansas I do doubt. Considering the hardness and color of the stone, I was expecting some translucency, but the stone is completely opaque.
Charnley is possible, I think, as the red-brownish streaks on the sides look somewhat similar to other CFs I've seen in pictures.
Under a 60x loupe the streaks from the side look similar to iron oxide. And in the top surface I can see small glittery particles of quartz, densely packed together.
The top on the other hard shows some subtle patterning, which reminds me a little bit of some Llyn Idwal, but also some light colored CFs.

What do you guys think?

Pictures below: