Gems and Astrology


According to Hindu astrology, life on earth is influenced by the navagrahas, or nine influencers. The placement of the navagrahas in one’s horoscope supposedly have an influence throughout an individual’s life. Wearing the nine gems is said to provide an astrological balance and benefit to the wearer. Hindu astrology also says that these gems potentially may have both positive or negative influences on human life, and that astrological gems should be worn only after consulting a Vedic astrologer, who is also conversant with gems. Based on an individual’s sidereal horoscope, either a single gem or a combination of compatible gems is advised to be worn to harness beneficial planets or counteract harmful planets.The supposed “astrological” or “piezoelectric” benefit of wearing or donating gems has not been scientifically quantified.

In ancient India, a number of Sanskrit texts on gems have been written.
Of a purely scientific, gemological knowledge are works like “Ratnapariksa” (literally ‘Gemology’), and “Mani-Mala”.  More specifically, the “Graha-Gocara Jyautisha”, the “Garuda Purana”, the “Brhat Samhita”, the “Agni Purana” are the texts dealing with planetary gemology.
As we already know, according to Vedic astrology, nine main gemstones are associated with nine planets. Associated with the sun is the RUBY,   with the moon is the PEARL,   with mars is the RED CORAL,   with mercury is the EMERALD,   with Jupiter is the YELLOW SAPPHIRE,   with Venus is the DIAMOND,   with Saturn is the BLUE SAPPHIRE,   with Rahu is the HESSONITE GARNET,   and with Ketu is the CAT’S EYE CHRYSOBERYL.

It is clearly stated in many passages of the different Vedic texts that  “inward luster, transparency, illumination with rays, sparkle, free from impurities and good formation of the shape are the characteristics of good gems”   (Agni Purana, 246.13-14).
Gems are not good if they are sandy, cracked within, scratched, stained, if they are lusterless, rough, dull or mixed with mineral substances even though they may have all the characteristic features of their family  (Garuda Purana, 70.18).
Since a jewel (gem) endowed with good characteristics ensure good luck, prosperity and success to kings, and one with bad ones, disaster and misfortune, connoisseurs ought to examine their fortune depending on jewels (gems)”  (Brhat Samhita, 80.1-3).
If anyone wears a gem of many flaws out of ignorance, then grief, anxiety, sickness, death, loss of wealth and other evils will torment him”   (Garuda Purana, 70.19).

To summarize, a planetary Jyotish gem should possess an eye flawless clarity, appealing color, good cutting, and a sweet feeling or “life” that will undoubtedly be felt by the person choosing that particular gem. As a general rule, it is advisable that the gem be of the finest quality affordable, and…the larger the better.

The use of alternative gemstones is practiced as well, especially for those gems which can be expensive over two carats sizes, such as diamonds and rubies. It is found, however that the alternative gem has a milder effect than the correspondent main gem. See in the table below the alternative gems, metals, and fingers used to wear rings related to the main gem and the correspondent planet.


Planet Metal Finger     Main Gem Alternatives
SUN Gold Ring RUBY  Rhodolite, red tourmaline, red spinel
MOON Silver Ring PEARL Moonstone
JUPITER Gold Index YELLOW  SAPPHIRE Topaz, Heliodor, citrine
MARS Gold Ring RED CORAL Carnelian
RAHU White gold Middle HESSONITE Orange zircon
MERCURY Gold Pinkie EMERALD  Tourmaline,  peridot,  chrysophrase, jade
VENUS Gold Middle DIAMOND White sapphire, damburite, white zircon
SATURN White/yellow Gold Middle BLUE SAPPHIRE Amethyst,  blue spinel, iolite
KETU White Gold Middle CAT’S EYE  –



Myths and opinions

Unprovable opinions, e.g. gems must be a certain number carat weight; must touch the skin; small gems don’t work; gems should be selected for harmful planets; for favorable planets; very flawed gems are acceptable; a cultured pearl is a real pearl; heat-enhanced gems have no powers; donating gems is beneficial; gems must be set in certain impractical metals otherwise they’re “powerless” etc., cannot yet be presented as facts. In no valid scripture or acceptable provable science are these facts. But, it is correct to say that “Planetary Gem Advisers” are of these varied opinions even though this is not supported by any valid scripture or acceptable provable science. Gems are believed to act metaphysically or astrologically, but proving that gems have such specific and measurable “powers” would be the first step toward scientific acceptance…