After a very informative afternoon at Randy Tuttle's house yesterday, trying different slurry's on natural stones. I tried all my bargain bin (one nice Coticule in the 6-8k spot) with their own slurry's.

L to R in the photo Whitish Unknown and very coarse hone, Queer Creek hone, Coticule, Translucent Ark.
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I used heavy slurry on the large coarse stone on the left, it turned black in seconds, then just water. Same with the Queer Creek stone, light slurry on Coticule then water, no slurry on the Ark. Roughly 20-30 laps per stone

The results were very good and surprising on antique store find that was basically a butter knife pre honing, after 20 laps on a cromox paddle and 60 on leather it pops hair as well as off my usual routine (1k synthetic, Norton 4/8k, C12K)