Natural mica, not synthetic. Mica is a stone mineral that is ground into a powder, because of this it has a natural shimmer similar to fine glitter. When natural oxides are used with heat, the results gives more vibrant colors. 

When the jars are initially filled, we fill them to the rim but occasionally the whipped scrubs will lose some volume and appear to have sunken since they are filled with air. It should never be by a lot though. 

Approximately 6 months. 

First, open it and mix it up since the oils and sugar may have seperated.  Next, stick it in the refrigerator for a couple of hours before taking it back out. It will have lost some volume if melted but you can whip it back up as an option. 

You can absolutely use it for full body exfoliation, although I do not recommend to use above the neck as it can damage your facial skin.