Choosing a gemstone, safely

Gemstones are the most bought and least understood remedy in jyotish. The logic is simple: each graha answers to a stone, and wearing the stone strengthens the graha's voice in your life. Ruby for Surya, pearl for Chandra, coral for Mangal, emerald for Budha, yellow sapphire for Guru, diamond for Shukra, blue sapphire for Shani, hessonite for Rahu, cat's eye for Ketu.

The mistake almost everyone makes

Amplify is the key word. A stone turns its planet's volume up; it does not turn a difficult planet good. Strengthening an ill-placed graha can strengthen its problems. This is why the honest first question is never "which stone suits my rashi" but "which graha in my specific chart deserves more power". Usually that is a well-placed benefic that rules a good house, not the planet causing trouble.

• Wear stones for well-placed grahas whose gifts you want louder
• Be cautious with Shani, Rahu and Ketu stones; test before committing
• One stone at a time; a hand full of rings is a chart full of noise
• Weight matters less than clarity; an eye-clean smaller stone beats a flawed large one

The trial period tradition

Older jyotishis rarely told anyone to buy a sapphire outright. The practice was to keep the stone tied to the arm, or under the pillow, for a trial of three days to a week, and to watch: sleep, temper, small fortunes and misfortunes. If the week ran rough, the stone went back. This modest empiricism is the tradition, and any adviser who skips it is selling, not advising.

If a stone is not for you

Every gemstone effect has a slower, gentler equivalent in mantra and daan. Reciting a graha's mantra on its weekday, or giving its grain and colour in charity, moves the same lever without the amplifier. For strained planets this is often the wiser instrument. A consultation should always offer you the full menu, not only the one that glitters.