Ruby's daily work time

If you think she's only yelling at others to do the work right, you're quite wrong.
Her 5 years of study in Mineralogy are the reason why she is the supervisor of the product gotten from the mines.
Did you know she is actually left handed?

And in case you want to know:
 Mineralogy is a subject of geology specializing in the scientific study of chemistry, crystal structure, and physical properties of minerals.