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Gemstone Calculator — Which Stone Should You Wear?

Your life, benefic and lucky stones from the lagna and its 1st, 5th and 9th lords, the method astrologers actually use, with the stones to avoid and why, and finger, metal, day, weight and mantra for each. Nothing is sold here.

  • Lagna method, not just rashi
  • Avoid list with reasons
  • Finger · metal · day · weight

Gemstone Calculator

Your life, benefic and lucky stones from the lagna and its 1st, 5th and 9th lords — the method astrologers actually use — with the stones to avoid, and how each is traditionally worn. We sell nothing.

Use the 24-hour time written on the birth record.

Pick from the list — the ascendant needs exact coordinates.

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In short

A Vedic gemstone calculator reads your lagna chart, not just your Moon sign, to find the functional benefics, the 1st, 5th and 9th lords, and names their stones as your life, benefic and lucky gems, while excluding the 6th, 8th, 12th and maraka lords. Each stone has a planet, a finger, a metal, a day and a weight by convention.

Last reviewed 23 August 2026 · Method: Lahiri ayanamsa, VSOP87/ELP positions · how we verify

What the calculator shows

Your life stone (lagna lord), benefic stone (5th lord) and lucky stone (9th lord), each with the planet and house behind it and the traditional finger, metal, day, weight, substitutes and mantra; an avoid list (the gems of your 6th, 8th, 12th, 2nd and 7th lords) with the reason for each; the enemy-stone pairs for your life stone; and the Moon-sign “rashi ratna”, labelled, with a line on whether it agrees with the lagna method for you.

Why the lagna, not the rashi

A gemstone is held to strengthen its planet. Whether that is good for you depends entirely on what the planet does in your chart, and that is set by the lagna: the same Saturn rules the 9th and 10th for a Taurus lagna (a yogakaraka) and the 6th and 7th for a Leo lagna (a maraka). A Moon-sign chart cannot see that. This is why careful practitioners distrust Moon-sign gem charts: not because the stones are dangerous in themselves, but because the method ignores the one thing that matters.

Before you spend

The claims for gemstones are traditional, not tested, and the market is full of treated and synthetic stones and of people who will frighten you into buying. If you choose to wear one: start with the life stone; buy certified and untreated; never combine enemy stones; and prefer the stone of a benefic planet whose dasha is running. Ask the AI astrologer if you want a second opinion; it has no commission to earn.

How this calculator works

Chart
Full kundli (VSOP87/ELP, Lahiri ayanamsa, whole-sign houses).
Recommend
Gems of the lords of the 1st (life), 5th (benefic) and 9th (lucky) houses; a planet ruling two of these appears once.
Avoid
Gems of the lords of the 6th, 8th, 12th (dusthanas) and 2nd, 7th (marakas) — unless that planet is also a recommended lord.
Wearing
Conventional finger, metal, day, weight and mantra per planet; enemy pairs from the classical planetary friendships.

The same engine casts the full janam kundli, so results here and there always agree. How we check the maths →

Reference

The nine gemstones and how they are worn

PlanetGem (Hindi)FingerMetalDayWeightSubstitutes
SunRuby (Manik)Ring fingerGold or copperSunday morning3–5 rattiRed garnet, red spinel
MoonPearl (Moti)Little fingerSilverMonday evening4–6 rattiMoonstone
MarsRed coral (Moonga)Ring fingerGold or copperTuesday morning5–9 rattiCarnelian
MercuryEmerald (Panna)Little fingerGoldWednesday morning3–6 rattiPeridot, green tourmaline
JupiterYellow sapphire (Pukhraj)Index fingerGoldThursday morning3–7 rattiYellow topaz, citrine
VenusDiamond (Heera)Middle or ring fingerPlatinum, silver or goldFriday morningDiamond ½–1 carat; white sapphire 3–5 rattiWhite sapphire, opal, zircon
SaturnBlue sapphire (Neelam)Middle fingerSilver or panchdhatuSaturday evening3–6 rattiAmethyst, iolite, blue spinel
RahuHessonite (Gomed)Middle fingerSilver or panchdhatuSaturday evening5–7 rattiOrange zircon
KetuCat's eye (Lehsunia)Middle fingerSilver or panchdhatuTuesday or Thursday3–7 rattiTiger's eye (weak)
FAQ

Gemstones — questions people ask

Lagna vs rashi, which finger and metal, what to avoid, and whether any of it works.

See it in your full kundli

Every placement, your running dasha and the doshas that apply — free, no sign-up. Then ask the AI what it means for you.