Lumiere Lusters™ by JetAge Studio are specialty color shifting, heat resistant metal oxide powders and flakes that are magical in resin, on polymer clay, and a multitude of other mediums.
Jar Sizes: the jars are filled by volume. Approx volume is 3ml. In the ballpark of .25 grams. Comparable to the size of an eyeshadow container or a generous spoonful. It looks small, but it is mighty. A little goes a long way.
Not an enamel, no respirator required. Although, don't sneeze or sigh or breathe too hard, or this stuff will be everywhere.
These are "high temp" - meaning you can use them in lampworking as well, in either soft glass or boro.