For fine edges and polishing touches, the Combo Coticule (Blue and Yellow) 5 x 1.5", Select Grade is what you'll need. 

FEATURES

• Can be used wet or dry
• Yellow coticule with 8000 grit (without a slurry), 6000 grit (with slurry)
  
• Blue coticule with 4000 grit 
• Use Yellow stone to polish edges; blue for sharpening dull blades
• Sprinkle water on stone before use 
• The difference between the standard and select grade coticules lies only in their appearance. Both stone grades have identical sharpening qualities.

TO USE

• Very hard stone  (harder that most artificial wet stones) requires lapping before first usage and from time to time.
• To lap: Use a lapping stone (i.e DMT-8C 325 coarse diamond sharpening stone or Norton Lapping Stone) or with sandpaper on a very flat surface (i.e. glass). 
• Tip: the long edges of the stone should be rounded slightly with a lapping stone or sandpaper. This way the risk of denting the blade in a normal honing motion across the stone is greatly reduced.

MATERIALS

• Natural sharpening stones
• Note: These are two natural stones and each stone is one-of-a-kind. The photo is for illustration purposes ONLY, and might not accurately represent the Coticule stone you will actually receive. 

SPECS

• Size: 5 x 1.5" (125 x 40 mm)
  

COUNTRY OF ORIGIN
Quarried in Belgium