The Nine Primary Jyotish Gemstones


Surya – Sun – Ruby – Sunday


Ruby is the gemstone for Surya/Sun.The best rubies come from Myanmar (formerly Burma). Vietnamese grades into Burma and is similar. Fine Thai ruby, although extinct at the mines, is also acceptable.

Color: Red, to slightly violet – red, to slightly pinkish – red.

Clarity: Rubies are a type two gemstone. Some minor inclusions using a loupe at 10x are acceptable, but gems should be eye flawless. Clarity should be VS1 or better.

Size: Fine Jyotish quality Rubies (as well as diamonds) are more powerful than other gems and most people do not require a minimum of two carats. 1.00 carat to 1.50 carat is the minimum for Rubies.

Cut: Look for good symmetry.

Shape: Oval, Cushion, Round, Emerald cut.

Enhancements: Regular heating is OK. Because the Sun is a hot planet, regular heating of rubies does not spoil their effects. Unheated rubies are super rare and desirable, although not required.

Beware: Avoid Beryllium diffusion heated rubies of Madagascar and Tanzanian origin, new lead-glass heated rubies (which are of poor quality, heavily treated and unstable), and glass filled cavities on back of gem. Also avoid brownish and overly dark tones.

Chandra – Moon – Pearl – Monday


Pearl is the gemstone for Chandra/Moon.Natural pearl of good quality is virtually extinct. Chinese tissue nucleated pearls are very effective, comparable to natural pearl, available in exquisite quality, and affordable.

Color: White or cream-white.

Luster: Very important, top luster is super shine, appears glowing from within.

Clarity: Smooth skin, no pits or blemishes.

Size: 3.00 carats up to 10 carats +.

Shape: Round or virtually round.

Enhancements: Can be bleached; avoid these.

Beware: Dull chalky luster, flat bottom, dimples or surface blemishes. Avoid Japanese Akoya pearls; very thin nacre renders them near useless.

Mangala – Mars – Red Coral – Tuesday

red coral  

Red Coral is the gemstone for Mangala/Mars.Choose natural, Red Coral from the Mediterranean or Sea of Japan, which is deep, slightly orange-red color and has no significant blemishes on top and is also clean on the bottom.

Color: Deep, even red with orange secondary; called ‘oxblood’ in the trade.

Clarity: Avoid pits, blemishes and cracks. Coral has natural growth rings.

Shape: Usually cut in cabochon cuts: oval, round and cushion. Avoid unsymmetrical shapes.

Size: 3.00 carats and larger.

Beware: Dyed coral is common in India and elsewhere. Plastic-filled is also common in India. Avoid splotchy color and areas of lighter color.

Budha – Mercury – Emerald – Wednesday


Emerald is the gemstone for Budha/Mercury.

Color: Slightly bluish or yellowish green. Deeper green is more powerful but do not sacrifice clarity for color.

Clarity: Emeralds are the most heavily flawed Jyotish gemstone. Emeralds are designated type three in clarity, the only Jyotish gemstone in this class. Chromium, the mineral that makes emeralds green also makes them flawed.

Therefore, it is very, very difficult to find nearly eye flawless emeralds, but these are the best for Jyotish. The rule is clarity first, then as much color as your budget will allow. Emeralds with top clarity and light color are far better than those with more inclusions and darker color. Clarity first and foremost! Buy the clearest emeralds possible. Called ‘crystal’ in the trade, super clean emeralds from Colombia and Brazil are acceptable, as are some Zambian emeralds, if not too dark in the crystal.

Size: 2.00 carats and larger. If exceptional in color and clarity, then smaller is OK: Minimum 1.00 carat.

Shape: Emerald cut, oval, cushion, round.

Enhancements: All emeralds are “oiled” with oil or synthetic resins. Look for the clearest clarity and buy from someone you can trust.

Beware: Avoid heavily treated emeralds. Some experts can determine the level of the treatment as minor, moderate or heavy. Minor treatment is OK. Be very careful of hidden cracks that can affect the durability of the emerald during setting, and after while wearing, especially in the corners. Do not buy Emeralds with black inclusions.

Guru – Jupiter – Yellow Sapphire – Thursday

yellow sapphire  

Yellow Sapphire is the gemstone for Guru/Jupiter.Unheated Yellow Sapphire from Sri Lanka (Ceylon), of top clarity and fine lemon yellow color, is most desirable. Some gems from Madagascar and Tanzania are acceptable too. Yellow Sapphire from Burma is nearly always too light.

Color: Fine strong yellow is most powerful. Light colors are less powerful and very light is not desirable for the best results.

Clarity: Eye Flawless, VS1, very slight inclusions with no black inclusions, cracks or milkiness.

Size: 2.00 carats or larger.

Shape: Oval, cushion, emerald cut, round.

Enhancements: Yellow Sapphires should be unheated. Avoid regular heat treatment which frequently makes these gems a more golden to orange color.

Beware: Avoid Beryllium Diffusion heat treatment, eye visible inclusions and very light or pale yellow color.

Shukra – Venus – Diamond – Friday


Diamond is the gemstone for Shukra/Venus.Diamonds are more powerful, when of high quality, than the other Jyotish gemstones. Diamonds of one carat or more are desirable.

Color: Choose a colorless or near colorless Diamond. Color grades D-E-F are colorless; G-H are near colorless. These are the most desirable colors.

Clarity: Choose clarity grades of VS1 or better: this means very minor inclusions that are difficult to locate by a trained diamond observer with a 10X power loupe.

Size: 1.00 carat or larger. Most people do not need two carats or larger.

Shape: Round, Emerald cut, Princess cut, Radiant cut, or Oval.

Certification: Gemological Institute of America, GIA, certified diamonds are preferred.

Beware: Avoid black inclusions, even minute ones at 10X. Also avoid: extremely thin or very thin or thick girdles; medium to strong blue fluorescence; fair to poor symmetry; overly deep diamonds, which are dark in the center; and any laser-drilled or filled diamonds.

Note: Any of the square or rectangular shapes are a good value. Emerald, Princess, or Radiant cut, sell for a discount of up to 20% compared to Round cut.

Shani – Saturn – Blue Sapphire – Saturday

blue sapphire  

Blue Sapphire is the gemstone for Shani/Saturn.It is very important for Saturn gems to be eye flawless and not heated. The best come from Sri Lanka (Ceylon), Madagascar and Myanmar(Burma). Blue Sapphires from Kashmir are king, but extinction of the mines has driven the price to many multiples of a comparable sapphire from other good locations. The premium price for Kashmiri Blue Sapphires does not yield better results for Jyotish effect.

Color: There is a large range of color from pale grayish blue to deep pure blue, with slight violet secondary. The best range is a light to medium, fine ‘cornflower’ blue which is not too dark. Look for ‘sweet’, pleasing colors.

Clarity: Blue Sapphires should be eye flawless, the more flawless the better. Minor rutile silk inclusions are acceptable and prove no heat. Avoid any but the most minute crystal inclusions, no cracks or cloudy quality. Avoid moderate to significant color zoning. Cleaner is better for Saturn gems.

Shape: Oval, cushion, emerald cut, round.

Size: 2.00 carats minimum

Enhancements: Avoid heated, Blue Sapphires of all types. The Garuda Purana states that heated Blue Sapphires are very bad for the wearer.

Avoid: Blue Sapphires that are very dark blue to nearly blackish blue in color.

Rahu – Hessonite/Gomed – Saturday

hessonite or gomed  

Hessonite/Gomed is the gemstone for Rahu.Hessonite means imperfection and this gem is moderately included. Look for clearest, nearly eye-clean material that is bright.

Color: Hessonite is a grossular garnet which is found in two main types today: light peach color and a more dark reddish brown color. The latter is also called cinnamon stone. Both types are also known as Gomed or Gomeda. Both are effective for Jyotish.

Clarity: Hessonite is a type two gemstone that borders on type three. This means more inclusions or flaws are normal. However, Hessonites that are eye flawless or only have very minute inclusions that can be seen with the naked eye are desirable.

Shape: Emerald cut, oval, cushion, round.

Size: 2.00 carats and larger.

Enhancements: None. This gem is never treated if it is eye clean.

Note: Some people prefer the lighter type Hessonites and others the darker type. The wearer should decide based on their personal preference.

Ketu – Cat’s-Eye Chrysoberyl – Tuesday

cat's eye  

Cat’s Eye Chrysoberyl is the gemstone for Ketu.The best quality comes from Sri Lanka (Ceylon) and should have a clear transparent body, and a good sharp eye, with no visible inclusions.

Color: A greenish yellow or yellowish green.

Clarity: Should be eye flawless, no cracks.

Shape: Cat’s Eye Chrysoberyl always comes cabochon cut in round or oval shapes. The bottom is almost always lumpy which is OK. But look for overall good symmetry.

Size: 2.00 carats and larger.

Phenomenon: The eye is a line of reflected light which appears to float on the surface of the gem. It should be very straight, sharp and bright.

Enhancements: Cat’s Eye Chrysoberyl is generally not enhanced, except for the rarely irradiated type.

Avoid: Weak or pale eyes (the line of light). Stay away from crooked bending eyes, cracks or significant visible flaws.

Beware: There is a type of Cat’s Eye that is irradiated in a nuclear reactor and is dangerously radioactive. Beware dark chocolate body colors; these are nearly always irradiated and should not be worn. Natural, untreated Cat’s Eye is yellowish green or greenish yellow, never chocolate brown color.

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