I was in a Dollar Tree after work today and spotted this:
$1 gets you a package of 8 micro glass jars with plastic stoppers that are filled with assorted color glitter effects.
There were 7 or 8 different types available but I only purchased 1 of each of the types that would interest customizers (the other types were very "girly" - like micro butterfly/flower/heart/etc. shapes). Each package contains 8 different colors of the same shape glitter.
Spheres:
Strips:
Discs:
Powder:
Flakes (my favorite):
I intend to use most of them as ingredients on shelves and tables for wizards, but I can see them being utilized as "elements" (think MASS Device-type) or food items.
I bet mixing up the different non-metallic spheres would yeild several jars of assorted candies for a scale sweet shop. The flakes would be ideal scale rock candy as well.
Some demo shots to show scale: