The duration of the crystal therapy course varies according to your preference and age. The Institute of Vedic astrology provides two different courses to learn crystal therapy. The courses are namely as
1) Diploma in Gems Healing & Crystal therapy: Beginner level
2) Professional diploma in gems healing & crystal therapy: Beginner to advanced level
The course duration varies from 6-12 months, the wherein professional diploma you get specialization and to enroll in it, you need to be 18+.