What materials are more than 8000 grit?

[HeavyTakeMusic]

Im online looking at the 8" Dia-Sharp® Continuous 8000 Extra Extra Fine Diamond Bench Stone. It's pretty expensive. Wondering if I could just use a flat slab of marble instead? Or any other easily acquired piece of material?

 

[hank_rearden]

extra extra according to their chart is 3 microns. the natural stone that matches that is siltstsone but its particles range from 62 microns down to 3.9 microns. anything smaller than 3 microns in nature is classified as mudstone (clay particles mostly.) sandstone (above 60 microns) would be your medium to extra course.

marble, like glass, is non-clastic. that means it has no particles. it's massive in structure. the only way a non-clastic stone can grind/sharpen a blade is for its surface texture to abrade the steel, and use some of the steel that has powdered to help in sharpening. besides that, you apply an abrasive powder.

 

[Jason B.]

Having a high grit stone does no good if you don't have the proper progression leading up to the high grit finishing stone.

What stones and in what grits do you have?

What types of steels do you sharpen?

 

[HeavyTakeMusic]

Having a high grit stone does no good if you don't have the proper progression leading up to the high grit finishing stone.

What stones and in what grits do you have?

What types of steels do you sharpen?

I have a 240/320 stone and a 1k/6k stone. ive got green, black, and white compound. i want that 8000 cause it polishes like crazy. looks almost out of factory. not needed but id like to have one. ill be sharpening vg-10 steel

 

[Jason B.]

Imanishi 10k

Cheap but good 10k that will polish to a very high level. Waterstones "grit" is different from most other stones, the finer grits such as a 8k are very fine. Diamond hones are rated in mesh which is a bit coarser so the 8k DMT is more like a 3-4k waterstone.