White Silver

ceramic abrasive for about one hour, and the white surface turned
into a very bright but whiter than normal silver color. 
What did I do to these charms, and are they still OK to use? 

Congratulations, you’ve just Depletion-Gilded your silver pieces. :smiley:
Or whatever the equivalent term is for silver.

Leaving the pieces in the pickle for that long removed all the
non-silver material on the outer layer, and then polishing it made it
shiny. So now on the outer layer is a very thin layer of fine
silver, which is why it looked brighter white than sterling (just
like depletion-gilding gold makes the surface look like 24k).

So, don’t worry, the charms should still be fine and can still be
marked sterling. :slight_smile: