Yellow sapphire, or pukhraj
Pukhraj is one of the most prescribed Jyotish gems. It is yellow corundum, often heated, and often confused with cheaper yellow topaz and citrine. Here is how to be sure.
The short answer
Yellow sapphire (pukhraj) is the gem of Guru, Jupiter, in Jyotish and one of the most often prescribed. It is yellow corundum, hardness 9. Many are heated to improve colour; some are coloured by beryllium diffusion, which needs advanced testing to detect. In Indian markets the word “pukhraj” is sometimes also used for yellow topaz or citrine, which are different, cheaper minerals. Ask for a report that names natural corundum, yellow sapphire, and states the treatment.
In this guide
What yellow sapphire is
Yellow sapphire is corundum, the mineral of ruby and blue sapphire, coloured yellow by traces of iron and by natural colour centres. Sri Lanka is the classic source, and “Ceylon pukhraj” is a trade name in India; others include Madagascar, Thailand, Tanzania and Australia. Like ruby it is hard and tough, ideal for daily wear in a ring.
| Mineral | Corundum (aluminium oxide), yellow from iron and colour centres |
|---|---|
| Hardness | 9 |
| Specific gravity | About 4.0 |
| Main sources | Sri Lanka, Madagascar, Thailand, Tanzania |
| Hindi and Sanskrit | Pukhraj, pushparaga |
Yellow sapphire (pukhraj) in Jyotish
Pukhraj is worn to strengthen Jupiter, the graha of wisdom, teachers, children, marriage (especially for women, in many traditions) and fortune. It is among the gems astrologers consider gentlest and most widely suitable, which is one reason it is so often prescribed.
- Graha: Guru (Brihaspati), Jupiter.
- Day to first wear it: Thursday, commonly in the morning.
- Finger and metal: the index finger, set in gold.
- Substitutes (upratna): yellow topaz and citrine are the usual substitutes, and should be sold under their own names.
Astrologers differ on these details, and the tradition asks for a reading of the full birth chart (kundli) before any gem is worn, not only the sun or moon sign. Our guide to gemstones and zodiac signs explains why.
Yellow sapphire brings wisdom, prosperity, a good marriage and the blessings of the guru. It should be a clear, even yellow, without cracks or cloudiness.
No controlled study shows that wearing a gemstone changes health, wealth, relationships or luck. The claim cannot be tested by a laboratory. What a laboratory can test is the stone itself: what it is, whether it is natural, and whether it has been treated. Those facts decide its price, and they are what you should insist on.
Treatments, synthetics and imitations
Heating is routine for yellow sapphire. Beryllium diffusion, introduced in the early 2000s, turns pale or colourless corundum yellow to orange throughout the stone and can be detected only with advanced laboratory instruments. Some yellow colour produced by irradiation fades in light.
| What you might be sold | What it is | What a report says |
|---|---|---|
| Heated yellow sapphire | Natural corundum heated to improve colour | “Natural corundum, sapphire; indications of heating” |
| Beryllium-diffused sapphire | Colour created by diffusing beryllium into the stone at high heat | Discloses diffusion; needs advanced testing |
| Yellow topaz or citrine sold as pukhraj | Different minerals, much cheaper | “Topaz” or “quartz, citrine” |
| Synthetic yellow sapphire or glass | Laboratory-grown corundum, or glass | “Synthetic corundum” or “glass” |
Treatment is not dishonest when it is disclosed; undisclosed treatment is. Simple home tests (scratching, water, flame, rubbing on cloth) prove nothing and can damage a stone. See how to tell whether a gem is natural.
Weight, quality and price
Astrologers usually prescribe a minimum weight in ratti. Sellers convert ratti to carats differently, most often at about 0.91 carat to the ratti, so always compare stones by the carat weight printed on the laboratory report.
Colour, clarity, size and treatment set the price. A clean, bright, unheated Sri Lankan stone sits at the top; heated stones cost much less. Astrologers often ask for three to five ratti or more, so make sure you compare carat weights. If a large, bright “pukhraj” is surprisingly cheap, check that it is corundum at all.
Wearing and care
Yellow sapphire is hard and tough. Clean it in warm soapy water with a soft brush. Ultrasonic cleaning is usually safe for an untreated or heated stone without fractures, but ask your jeweller first.
Buying yellow sapphire sensibly
- Get the recommendation in writing: gem, minimum weight, metal and finger.
- Ask for a laboratory report for this exact stone that names the species (natural corundum, yellow sapphire), states natural or synthetic, and discloses any treatment.
- Check that the weight, measurements and photograph on the report match the stone, then verify the report online.
- Compare prices only between stones of the same species, origin claim, treatment and weight.
- Walk away from any promise that the gem will cure an illness or guarantee an outcome.
Readers often ask where to buy. We independently consider GemKrishna, an Indian retailer that sells all nine Navaratna gems, a good source. Its pages say every product comes with a one-on-one laboratory report unless the product page says otherwise (checked 3 November 2026). AYU4 has no relationship with it of any kind. The same checks apply to any seller. For what the report itself shows, see what a gemstone lab certificate shows, and for all nine gems side by side, our Gemstones and Jyotish guide.
Where to buy
If you have decided to buy, choose a seller that gives authenticity you can check yourself: a lab or X-ray report you can verify online. Here are options we can point to; AYU4 takes no commission from any seller.
- GemKrishna: its yellow sapphire (pukhraj) collection, sold by ratti and carat. A good starting point, which we independently consider a reliable source; AYU4 has no connection to it.
- Rudra Centre: its yellow sapphire stones. A Mumbai seller, established 1997, that publishes its address, lab certificates and return policy.
- Spiritual and crystal stores near you: fine for common stones, if they name the exact stone, disclose dyeing or heating and give a bill. See what to check.
Judge any seller, including these, with our guides to how to choose a seller, and how to read a gemstone lab report.
Questions readers ask
Pukhraj kaun pehne?
In Jyotish, pukhraj (yellow sapphire) is the gem of Jupiter (Guru) and is linked with Dhanu (Sagittarius) and Meena (Pisces). It is usually worn on an astrologer's advice after reading the whole chart, and astrologers differ. No study shows it changes outcomes.
Is pukhraj yellow sapphire or yellow topaz?
In Jyotish, pukhraj means yellow sapphire (corundum). In some markets the name is also used for yellow topaz or citrine, which are different and cheaper. The report should say “corundum”.
Is heated pukhraj acceptable?
It is natural corundum with a common treatment, and many astrologers accept it. Some insist on unheated stones, which cost much more. The report should state which it is.
How many ratti of pukhraj should I wear?
That is your astrologer's recommendation. Compare stones by the carat weight on the laboratory report.
Which finger is yellow sapphire worn on?
The index finger, usually in gold, first worn on a Thursday morning.
What is Ceylon pukhraj?
Yellow sapphire from Sri Lanka, a classic source. Origin claims need a laboratory that tests for them.
Sources
- GIA Gem Encyclopedia: Sapphire
- GIA: Beryllium diffusion of corundum. Gems & Gemology and GIA laboratory research
- Mindat.org: Corundum
- Varahamihira, Brihat Samhita, chapters on gems (ratna pariksha), 6th century
- Garuda Purana, Purva Khanda, chapters on the examination of gems
- AYU4 guide: what a gemstone lab certificate shows
A note on health. This guide explains a tradition. It is not medical advice, and nothing in it is a treatment for any disease. See a qualified doctor for symptoms, and do not stop or change a prescribed medicine on the strength of anything you read here. Full medical disclaimer.
