I have had mixed results with Ayurvedic medicine. Using Ayurvedic toothpaste has gotten my teeth and gums to be healthier than they ever were when using conventional brands of toothpaste; using oil before showers occasionally has really helped my skin. The recommended foods have not worked for me.
That said, it is an interesting system of energy.

Uses of Gems:
For healing: Amethyst, Bloodstone, and Pearl. (I find Pearl draining unless used with other stones. I would not use it for physical healing unless you have an over abundance of energy; but for emotional healing it is ideal)
To experience subtle effects of energy: Diamond, Lapis Lazuli, and Ruby.
To attract creativity: Bloodstone and Pearl.
For receptivity: Agate, Beryl (I use Citrine or Amethyst).
To provide general protection: a Beryl. (I use Sodalite or Mother of Pearl)
For protection against cold: Carbon Steel (I haven't used this. I would instead try Rose Quartz.)
For protection against anger: Pearl, Opal

~from Maat's Book of Shadows