Good tip. Here is one for sorting stones when getting ready to set.
Use a plastic tray that is sold for mixing watercolors in. It is a
series of little depressions or cups that make great stone holders. I
label the bottom of each depression or cup with a sharpie as to stone
size. Each size is .1mm larger. Then as I sort the stones I drop them
in the appropriate size depression or cup. When I need a particular
size stone for the setting I know right where to look. No Guessing. I
also sort sizes for tennis bracelets this way. Frank Goss