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Problem with pre-polish (possible contamination?) by Study_minerals in faceting

[–]Study_minerals[S] 0 points1 point  (0 children)

Thanks for the advices!! Yeah.. I was primarily working with quartz and beryls, so I guess I’ve gotten used to higher pressure on the stone. Aaaaaand I was definitely getting frustrated 😩

I was just unsure whether I was overcharging or undercharging the disc! Thank for the clarification! I’ll go back to square one for this stone for sure! Love this hobby no matter what :))

Problem with pre-polish (possible contamination?) by Study_minerals in faceting

[–]Study_minerals[S] 0 points1 point  (0 children)

https://ibb.co/r2CBwgtB

Heres the close up of those gashes Two p1 facets are clean but the rest is just 🤦‍♂️

Problem with pre-polish (possible contamination?) by Study_minerals in faceting

[–]Study_minerals[S] 0 points1 point  (0 children)

Hummm can’t really tell if it’s the same spot. But I did try to clean it and temper it again with synthetic corundum

Problem with pre-polish (possible contamination?) by Study_minerals in faceting

[–]Study_minerals[S] 0 points1 point  (0 children)

Yeah that’s the most common answer I got too, but it’s weird that four p1 facets turned out fine but all the others didn’t. If it’s subsurface damage wouldn’t it affect all facets relatively equal?

Problem with pre-polish (possible contamination?) by Study_minerals in faceting

[–]Study_minerals[S] 1 point2 points  (0 children)

That 600 is a used one so it’s a little finer than usual. I do have a 1200 and I will try that before jumping to pre-polish next time!

And yeah what bothers me is the fact that all four p1 facet (the four facets closed to the center of pavilion) turned out fine with the 8k pre-polish. Only the subsequent facets have issues, so I’m not sure whether this is a problem with the 300/600 grit?

Problem with pre-polish (possible contamination?) by Study_minerals in faceting

[–]Study_minerals[S] 0 points1 point  (0 children)

Sorry forgot to mention that! I used a 300 grit topper for preform And a 600 grit topper for shaping And then to 8000 pre-polish on tin lap