Thread: Coticule Impurities (Black Lines)

"The raw Coticule rocks have cracks, black manganese spots, quartz blocks and other impurities in them..." -- Rob @ Ardennes Coticule

I often see coticules with black manganese spots/lines. (I think they look pretty cool.) How do these black manganese spots/lines affect honing?

Thanx,
Christopher

The lines have no ill effect on honing. I have coticules with such lines; they're not cracks but solid material.

Chris L

Here are two with the spots. Both vintage coticules glued to blue schist. Both real good hones.

Thank you both for the replies. I was afraid the black lines might be a harder substance, might ruin the edge. I am happy to hear otherwise.

And those stones are beautiful. I really dig the black spots/lines.

Me =)

We call them veins and inclusions. They could be softer and they could be harder but unless they are really so huge that they make up a substantial portion of the hone they have no effect on the business at hand.

Jimmy, that second hone looks familiar, did you snag that off of the Bay?