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Got my pocket microscope today and compared the scratch pattern of my phig and my CF. The scratches from the charnley seem to be more even and not as deep as the phig. The edge was also more even or "straighter".
It is extremely slow though but since I only own a few razors I don't mind.
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Sounds like ya found a winner. Dense Novaculite is a great finisher, does tend to leave a blade a bit in the sharp/nippy side. Especially if used with oil, imo that puts you about at the peak of what the stone can do. But on the bright side, you can switch to a thin shave lather rather than oil or just strop it a few more laps than you otherwise might to calm the edge down a bit.
I noticed earlier you were asking about oil. Dense Novaculite isn't terribly porous, so the oil likely hasn't penetrated far. If you want to clean it up, toss it in a bath of Simple Green (or similar degreaser) and let it soak for a day or two. I've got a vintage yellow lake that was used as an oil stone likely for decades before it fell into my hands. You wouldn't know it now.