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Gemstone astrology: which gemstone suits you, by Lagna
The gemstone of each planet, the rule for choosing one from your Lagna (ascendant), the gems to avoid, and how Astrojar decides, with sources.
In short
In gemstone astrology each planet has a gem, and wearing it strengthens that planet. So a gem suits you only when Parashara names its planet auspicious, or a giver of yoga, for your Lagna (ascendant), or it is your Lagna lord and he does not call it malefic (BPHS ch. 34 sl. 19-44). Astrojar never suggests a gem for a planet he calls malefic for your Lagna, and always adds: have your full chart checked first, then wear it for a short trial.
What is the gemstone of each planet?
These are the gems, substitutes, metals, fingers and days Astrojar uses in its remedies. The pairing of a gem with each planet comes from later tradition; BPHS itself does not list it.
| Planet | Gemstone | Substitute (uparatna) | Metal | Finger | First worn on |
|---|---|---|---|---|---|
| Sun | Ruby (Manik) | red garnet | gold | ring finger | Sunday |
| Moon | Pearl (Moti) | moonstone | silver | little finger | Monday |
| Mars | Red Coral (Moonga) | carnelian | gold or copper | ring finger | Tuesday |
| Mercury | Emerald (Panna) | peridot or green tourmaline | gold | little finger | Wednesday |
| Jupiter | Yellow Sapphire (Pukhraj) | yellow topaz or citrine | gold | index finger | Thursday |
| Venus | Diamond (Heera) | white sapphire or zircon | silver or platinum | middle finger | Friday |
| Saturn | Blue Sapphire (Neelam) | amethyst | silver or panchadhatu | middle finger | Saturday |
| Rahu | Hessonite (Gomed) | None given | silver or panchadhatu | middle finger | Saturday |
| Ketu | Cat's Eye (Lehsunia) | None given | silver | ring finger | Tuesday |
Which gemstone suits each Lagna?
Find your Lagna (the sign rising at birth, on your kundli). The table follows Parashara's list for each Lagna and is computed by the same code that chooses remedies in Astrojar's answers.
| Lagna (ascendant) | Lagna lord | A gem may be considered for | Parashara calls malefic: never a gem |
|---|---|---|---|
| Aries (Mesha) | Mars | Sun (Ruby), Mars (Red Coral), Jupiter (Yellow Sapphire) | Mercury, Venus, Saturn |
| Taurus (Vrishabha) | Venus | Sun (Ruby), Saturn (Blue Sapphire) | Moon, Jupiter, Venus |
| Gemini (Mithuna) | Mercury | Mercury (Emerald), Venus (Diamond) | Sun, Mars, Jupiter |
| Cancer (Karka) | Moon | Moon (Pearl), Mars (Red Coral), Jupiter (Yellow Sapphire) | Mercury, Venus |
| Leo (Simha) | Sun | Sun (Ruby), Mars (Red Coral), Jupiter (Yellow Sapphire) | Mercury, Venus, Saturn |
| Virgo (Kanya) | Mercury | Mercury (Emerald), Venus (Diamond) | Moon, Mars, Jupiter |
| Libra (Tula) | Venus | Moon (Pearl), Mercury (Emerald), Venus (Diamond), Saturn (Blue Sapphire) | Sun, Mars, Jupiter |
| Scorpio (Vrishchika) | Mars | Sun (Ruby), Moon (Pearl), Mars (Red Coral), Jupiter (Yellow Sapphire) | Mercury, Venus, Saturn |
| Sagittarius (Dhanu) | Jupiter | Sun (Ruby), Mars (Red Coral), Mercury (Emerald), Jupiter (Yellow Sapphire) | Venus |
| Capricorn (Makara) | Saturn | Mercury (Emerald), Venus (Diamond), Saturn (Blue Sapphire) | Moon, Mars, Jupiter |
| Aquarius (Kumbha) | Saturn | Venus (Diamond), Saturn (Blue Sapphire) | Moon, Mars, Jupiter |
| Pisces (Meena) | Jupiter | Moon (Pearl), Mars (Red Coral), Jupiter (Yellow Sapphire) | Sun, Mercury, Venus, Saturn |
BPHS ch. 34 sl. 19-44 (auspicious and malefic grahas for each Lagna); ch. 34 sl. 2-7 and 13 (why). This is a starting point, not a prescription: the strength and placement of the planet in your own chart decide.
How does Astrojar choose a gemstone?
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1
Find the planets Parashara calls good for your Lagna
For each Lagna, BPHS ch. 34 sl. 19-44 names the planets that are auspicious and those that give a yoga (such as Mars for Cancer, which rules both the 5th and the 10th). Astrojar adds the Lagna lord, unless Parashara names it a malefic.
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2
Leave out the malefics he names
Strengthening a planet strengthens everything it rules. Astrojar never suggests a gem for a planet Parashara calls malefic for your Lagna, and never for Rahu or Ketu automatically.
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3
Pick the one that matters for the question
When you ask Astrojar about your career or marriage, it chooses the strongest of those planets for that matter. If none qualifies, it falls back on the Lagna lord, which supports the whole chart.
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4
Pacify troublesome planets without a gem
A difficult running dasha lord, Saturn during Sade Sati, or the planet behind a dosha gets mantra, charity or worship, never a gemstone.
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5
Check, then try
A gem is always given with the same note: only after an astrologer checks your full chart, and after a short trial period.
Can you choose a gemstone by date of birth or Moon sign?
The rule above needs your Lagna, and the Lagna changes about every two hours, so it needs the time and place of birth as well as the date. Lists of "lucky stones" by Moon sign or by month of birth use other systems; Astrojar does not use them. If you know your birth details, the Horoscope Report or a question in the Astrojar app gives the remedy for your own chart. To find your Lagna and its lord, see the 1st house and the Lagna lord.
Questions about gemstones
What is gemstone astrology?
Gemstone astrology pairs each of the nine planets with a gem (Ruby for the Sun, Pearl for the Moon, Red Coral for Mars, Emerald for Mercury, Yellow Sapphire for Jupiter, Diamond for Venus, Blue Sapphire for Saturn, Hessonite for Rahu, Cat's Eye for Ketu). A gem is worn to strengthen its planet, so it is meant only for a planet that is good for your chart. The pairing comes from later tradition, not from BPHS.
Which gemstone should I wear according to my birth chart?
Astrojar follows Parashara's list for your Lagna (BPHS ch. 34 sl. 19-44): a gem is considered only for a planet he calls auspicious or yoga-giving for that Lagna, or for the Lagna lord unless he names it a malefic. The table on this page gives the result for each Lagna. Even then, have your whole chart checked and wear it for a short trial first.
Can I find my gemstone by date of birth alone?
Not reliably. The rule works from the Lagna (ascendant), which changes about every two hours, so it needs the birth time and place as well as the date. Birthstones by month of birth are a different, Western custom.
Which gemstones should not be worn?
Astrojar never suggests a gem for a planet Parashara calls malefic for your Lagna (the last column of the table), and never suggests the Hessonite and Cat's Eye of Rahu and Ketu automatically. Strengthening a planet strengthens everything it rules, the difficult houses too.
Is a substitute stone (uparatna) as good as the main gem?
Tradition offers cheaper substitutes such as red garnet for Ruby or yellow topaz for Yellow Sapphire. Astrojar lists them as the tradition gives them; it has not measured whether either one works.
Do gemstones really work?
Astrojar has not measured gemstones against outcomes, so it gives them as a traditional remedy, never as a promise. A gemstone is not a substitute for medical treatment, financial advice or your own effort.
Is the gem of my Lagna lord always safe?
Usually, since a strong Lagna lord counters evils (BPHS ch. 10 sl. 4). But Parashara names a few Lagna lords among the malefics of their own Lagna, because they also rule a difficult house: Venus for Taurus, which also rules the 6th. Astrojar follows him, so Diamond is not suggested for a Taurus Lagna.
Keep learning
- The 9 planets (navagraha) What each planet rules, and where it is strong.
- Lord of the 1st house Your Lagna and its lord, for every ascendant.
- The 12 houses and their lords Every house lord by Lagna, including the 6th, 8th and 12th.
- Mangal dosha (kuja dosha) When Mars is a dosha, and the remedies for it.
- Shani Sade Sati calculator Saturn's 7½ years, pacified without a gemstone.
- Horoscope Report Your chart's remedies, with the year ahead, ₹199.
- More from the Astrojar blog Guides to reading your own chart, with sources.
- Astrology remedies Each graha's mantra, charity and deity, and when a gem is not given.
Sources
- BPHS ch. 34 sl. 19-44 (the auspicious, yoga-giving and malefic grahas for each Lagna; the rule Astrojar follows).
- BPHS ch. 34 sl. 2-7 and 13 (why: functional benefics and malefics; the yogakaraka).
- BPHS ch. 10 sl. 4 (a strong Lagna lord counters evils).
- The gem, substitute, metal, finger and day of each planet: later tradition, as used in Astrojar's remedies.
Chapter and verse numbers follow R. Santhanam's English translation of BPHS (Ranjan Publications). About the text.
This is the traditional reading of the classical texts, given for learning and reflection. It is not a prediction for you, and not medical, legal or financial advice.
Ask which remedy suits your chart
Ask Astrojar about your own chart: your first 3 questions are free. Or get a full report made from your birth chart.