Thread: Razorlovestones Project / Magnification Shots of Stones

Short addendum: I was wrong, no autoslurry. After the 1200 w/d, I could see little slurry for a long time in the water with a flashlight, when it went on the steel with fast strokes. Meanwhile not anymore.
Interesting, these blue-grey areas seems to be a little softer then the yellow areas. I tested it with a "scratch test" with a needle. It is not hard quartz I think.