At certain Mage level, you can use a certain jewel, as follows:
# of Mage skills- Jewel- effect
2 - Quartz- identify- like the scroll
4 - Opal- heal- like healing salves
6 - Garnet- cure- like seltzer water
8 - Emerald- panic- like panic dust
10 - Ruby- blind- like blast dust
12 - Turquoise- blast- like blind powder
14 - Diamond - enrage - like a mandrake root