This tool reads your birth chart and names the Vedic gemstone (ratna) for each graha the chart shows as needing support. The selection is made by strength, not by birth month: it computes Shadbala for the seven planets and prescribes for every one that falls below the minimum Brihat Parashara Hora Shastra requires of it, and it adds Mars when Mangal dosha is present and Saturn when Sade Sati is running. For each stone you get the planet it serves, the metal, the finger, a weight range, the day to first wear it and the mantra.
In Vedic astrology a gemstone is prescribed to strengthen a specific planet, and never chosen by your birth month. This calculator makes that choice arithmetically. It computes Shadbala - the six-fold strength - for the seven grahas and compares each total against the minimum that Brihat Parashara Hora Shastra requires of that planet: 390 virupas for the Sun, 360 for the Moon, 300 for Mars, 420 for Mercury, 390 for Jupiter, 330 for Venus and 300 for Saturn, which are 6.5, 6.0, 5.0, 7.0, 6.5, 5.5 and 5.0 rupas. Every planet under its own line is one the chart is showing as under-supported, and a stone is named for it.
Two chart conditions add a planet regardless of its Shadbala: Mars is included when Mangal dosha is present, and Saturn when Sade Sati is currently running. Classical practice adds a further layer this tool does not decide for you - the life stone of the Lagna lord and the lucky stone of a trikona lord (the 5th or 9th house ruler) are the two most often prescribed, while the gems of functional malefics, the planets owning difficult houses for your ascendant, are traditionally left alone. That is why the same stone can be recommended for one ascendant and withheld for another, and it is worth discussing with an astrologer before you buy.
Each graha has one primary ratna, with a metal, a finger and a weekday attached to it. These are the rows the calculator draws on:
The tool also names an alternate for each primary - red garnet or red spinel in place of the Sun's ruby, for instance - because a natural, untreated primary can be far beyond most budgets. The metal, finger and weekday belong to the graha's row rather than to one particular stone, so they stay the same whichever of that planet's stones you wear.
The parts of a gemstone prescription that trace to a named text and the parts that do not are kept apart on this page rather than presented as one body of doctrine. The identity and grading of the ratnas is classical: Brihat Samhita devotes its chapter 80, the Ratna-pariksha, to identifying and testing gemstones. The mantra and its japa count are classical too, and they come from Brihat Parashara Hora Shastra's Graha-Shanti chapter, verses 19 to 20, which give the nine counts in thousands - 7,000 for the Sun, 11,000 for the Moon, 10,000 for Mars, 9,000 for Mercury, 19,000 for Jupiter, 16,000 for Venus, 23,000 for Saturn, 18,000 for Rahu and 17,000 for Ketu, totalling 1,30,000.
Two things are not classical, and the tool labels them where it shows them. The carat weight bands are twentieth-century jeweller convention: Brihat Samhita ch. 80 grades stones but prescribes no per-graha ring weight anywhere. So is the wearing ritual - washing the ring in raw milk and Ganga water, chanting 108 times, first wearing it in the planet's own hora. The BPHS remedial chapter prescribes mantra, yantra, daana (charity) and puja, not a wearing rite. Both are kept because they are what practitioners actually do, and both are shown with the note that they are modern practice rather than a chapter and verse.
It depends on your birth chart, not your birth month. This calculator computes Shadbala for the seven grahas and names the gemstone of every planet that falls below the minimum strength Brihat Parashara Hora Shastra requires of it, adding Mars if you are Manglik and Saturn if Sade Sati is running. Classical practice also weighs the life stone of the Lagna lord and the lucky stone of a trikona lord, which is a judgement to make with an astrologer.
The usual practice is to wear it in the prescribed metal on the assigned finger, first put on during the ruling planet's day and hora in the Shukla Paksha, after washing the ring in raw milk and Ganga water and reciting the planet's mantra. Be aware that this ritual, and the carat weight bands quoted alongside it, are modern practitioner convention rather than a classical prescription - the Brihat Parashara Hora Shastra remedial chapter prescribes mantra, yantra, charity and puja, not a wearing rite.
Neelam, the stone of Saturn, is the fastest-acting gemstone in practitioner tradition, so it is usually trialed for a few days before being worn permanently. It is recommended only when Saturn is a functional benefic for your ascendant; otherwise a gentler alternate such as Amethyst is preferred. This tool names Neelam when Saturn's Shadbala falls below 300 virupas or when Sade Sati is running, which is a strength finding, not by itself an instruction to buy.
By Shadbala, the six-fold strength of Brihat Parashara Hora Shastra, measured in virupas. Each planet's total is compared against its own required minimum - Sun 390, Moon 360, Mars 300, Mercury 420, Jupiter 390, Venus 330, Saturn 300 - and any planet below its line is treated as needing support. Mars is also included when Mangal dosha is present and Saturn when Sade Sati is active, whatever their Shadbala says.
No, and the tool labels them as such. Brihat Samhita ch. 80, the Ratna-pariksha, identifies and grades gemstones but prescribes no per-graha ring weight, and the BPHS remedial chapter prescribes mantra, yantra, daana and puja rather than a wearing procedure. The carat bands and the milk-and-Ganga-water ritual are twentieth-century jeweller and practitioner convention, kept because they are what is actually done, and shown with that note attached.
Yes, as exactly as you can give it. Shadbala includes positional, directional and temporal components that depend on the ascendant and on the hour, so a wrong birth time can move a planet across its required minimum and change which stone is named. If your recorded time is uncertain, the birth-time rectification tool is the place to test it before acting on a prescription.
Personalized gemstone, rudraksha, mantra and Lal Kitab remedies tuned to your chart's weak points.
For educational purposes. Astrological interpretations are traditional and not a substitute for professional advice.