Vedic astrology links each planet to a gemstone that can strengthen beneficial influences or calm difficult ones. Start with your birth chart (kundli) and identify the ruling planet of your Lagna and the current dasha lord.
Prefer natural, untreated stones with a reliable certificate. Wear the gemstone on the finger and metal recommended for that planet, ideally after a short energizing ritual.
If you are unsure, consult an astrologer before investing in high-value stones — the right match matters more than the size of the gem.