Well, I did a value assessment, not to be confused with a cost assessment (i.e. I got this hone from my father and have $0 in it. I bought my flattening stone for about $50. Therefore the hone cost me much less than 1/50th what the flattening stone did however I can buy a new flattening stone. The hone is invaluable to me and irreplaceable.) I decided to do whatever it took to lap it and remove the glaze from the fine side.

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This is what it looks like now. You can really see the mineral.in it now.
Also, I showed it to a friend who is a jeweler and he said he believes that it is manmade and made of a made/synthetic mineral. He also pointed out that you can see a seam on both sides. Furthermore he said it could very well be diamond but he can't say for sure because it is too big to fit under his scope. I could have it analysed but it would mean destroying a peice of it. I did however keep the water with the slurry from lapping it so theoretically I could filter out the solids and put it under the scope.
Maybe I'm beating a dead horse here but I just really want to get information on it and I'm hoping knowing what it is made of will help. Also hoping a new picture will help someone recognize it.
Still love to hear some opinions.