General Introduction: Yellow sapphire  is a very attractive and glowing gem. It is pleasing to see a rare piece of Yellow sapphire. Yellow sapphire is found in mines. According to gemologists, it is simply a silicate that consists of aluminum and fluorine. Pure silicate of Yellow sapphire is as transparent as pure water. This transparent silicate is called white sapphire. But only the Yellow sapphire is considered to be the Gururatna. Yellowness in Yellow sapphire takes place due to some morbidity in fluonsyllicate. But the yellows sapphire happens to be the Guru Ratna only due to this morbidity. Sri Lanka (formerly Ceylon) is one of the largest producers of fine sapphires. Many sapphires from Sri Lanka are large stones exhibiting light color and a high level of transparency.
Jupiter, a planet having sky elements in it, plays a vital role in influencing the intellect wisdom of a man. Jupiter is called Bruhaspate also. Jupiter is also the significator of writing, publishing, Tantra-Mantra, Vedas and other classics, wisdom, moral conduct and gentility.
This Gem is of Dhanu (Sagittarius) & Meen (Pisces) Rashi. Pukhraj gem is governed by the planet Jupiter. One of the most important of the celebrated ‘Navgrahas’. Pukhraj has all along been considered as a great talisman gemstone. It is the chief signification of property, so after using Pukhraj we also get property increased up. It is prescribed for jaundice, gastric, chronic constipation, cough, colds, asthma, nose bleeding, apoplexy, tumor, liver weakness, ear trouble & high blood pressure etc.
Use of the gem: Yellow sapphire should be worn in a gold ring or locket on a Thursday morning after having bath, washing it with raw milk and worshiping with Dhoopa, Deipa, flowers, Akshata etc. with contemplation of Jupiter or Vishnu having been north facing and by reciting the following Mantra. The ring should be worn on index finger. It should weigh 4 to 8 carats. The gem should be worn again the same way if it gets cracked or is lost or stolen.

Mantra: Om Graang Gring Graung Sah Guruwe Namah.