with characteristics much like a cross between a *good* hard Arkansas and a translucent Arkansas

Regular - vintage soft stone for coarse sharpening

all diamond particles in Atoma are gathered into cluster pattern

If you are unsure what compound to purchase

F150 + F400 OCB

venev unicorn series dual side resin cbn 6 x 1 Grit:400 + 800 with characteristics much like aVenev Unicorn Series Dual Sided Resin Bonded CBN Stones are designed for use in sharpening systems such as Hapstone and TSProf, as well as for freehand sharpening. CBN (Cubic Boron Nitride) is the second hardest material after diamond, offering exceptional wear resistance and thermal stability. CBN sharpening stones provide excellent performance when working with high alloy, powder, and hardened steels. The Unicorn Series represents Venevs premium