Well, after a day of grueling work on the tailings pile at the Pala mine (my daughter is too young to go to the freestyle searching area, so we needed to work the tailings pile and tables), we found a bunch of stones, mostly black tourmaline, milky quartz, a cloudy piece of aquamarine, and some specks of some clear watermelon tourmaline.

A lot of the black tourmaline had white (calcium?) deposits on it, and I would like to clean it off without damaging the black base material (see picture).  Can that be done?  I read sometimes Oxacylic acid can clean off stones, but unsure if that would damage the black part, etc.

Also found this interesting purple colored rock (much more purple than the picture shows - moscovite, maybe?), and something that looks like a cloudy light pink tourmaline? 

Overall, we had a fun at Pala and would go back again sometime.

Any guidance or ID info would be appreciated - thank you! 

JoeM - thank you!  We were soooo busy screening that when we got home we realized we didn't take any "action" shots.    Next time for sure!

Appreciate the answers as well.  Pity about being unable to remove the calcite - if I used an xacto blade, I would probably stab myself so I suppose those chunks with calcite will just go in the tumbler.  I'll do some research on the Ledidolite - need to find a way to get the color right in the picture next time as well.

Thanks again for the input!!