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Miracle Power of Gems

The word ‘Sapphire’ is derived from ‘Sapphirus’, which is Latin for blue. When the word sapphire is used it actually means the beautiful blue sapphire . However, in India the yellow sapphire is the most popular gemstone after diamond, due to its significance in Indian astrology. The yellow sapphire is commonly known as Pukhraj or Pushparaga in the Indian market.

Low Quality Yellow SapphireYellow sapphire is one of the Navagraha stones (stones that represent the nine planets that have a cosmic influence on all earthlings) representing the planet Jupiter (Guru) and is related to the spiritual teacher. It has a special significance in Indian astrology and in ancient Indian vedic literature. It is said to have many healing powers and it also has an important place in the study of star signs.

Yellow Sapphires are said to bring prosperity to anyone who wears it, thus making it one of the most popular gemstones in India. It is believed to improve the financial status of the wearer as well as bestow him or her with wealth, good health, fame, name, honour and success. The yellow sapphire is also believed to promote the general well bring and spiritual knowledge of the wearer.

Natural Yellow SapphireIt is used to aid in holistic healing of the Mars affliction people and also as a holistic aid in pregnancy and in childbirth. For therapeutic or holistic purposes, the yellow sapphire ring must be made in gold and worn in the index finger.

Composition of Yellow Sapphire

The yellow sapphire gemstone is an aluminum oxide (Al 2 O3). It’s specific gravity is 3.99 to 4.00 and refractive index range is 1.760-1.768 to 1.770-1.779. Its hardness on Mohs scale is 9. It’s the next hardest mineral after diamond.

Ceylon Yellow SapphireVarieties

The sapphire gems belongs to the gemstone family of corundum. The most pure form of corundum is colourless, but presence of trace elements adds colour to a corumdum gem. The cause of colour in sapphire is iron. While the word ‘Sapphire’ is derived from the Latin word ‘Sapphirus’, the word “corundum” is derived from Hindu words Kurand or Kuruvinda.

Physical Properties

Yellow Sapphire Colour

Good Quality Yellow SapphireYellow sapphires are found in a range of hues between greenish yellow and orangish yellow. Deep pure golden yellow without any tinge of orange is considered the best colour for a yellow sapphire.

Cut

Pale Yellow SapphireYellow sapphire is most commonly found in oval cut to retain maximum weight while cutting and getting the most out of the gem. But it is also cut and faceted into various common and fancy shapes like cushion cut, round, octagonal, square etc .

Carat

Yellow sapphires are commonly found in all sizes up to 8-10cts. But clean large size gems with good bright golden yellow colour are rare and highly priced.

Yellow Sapphire GemstoneClarity

Prominently visible or even faint natural inclusions like feathers, colour zoning, crystals etc are commonly found in pukhraj or yellow sapphires. This gem contains black inclusions, feathers, natural fissures which makes the price of the gem to around US$150 per carat.

Price and Buying Guide of Pukhraj – Yellow Sapphires

Small Yellow SapphireThe price of the genuine fine quality natural yellow sapphire depends mainly on its colour and clarity. The deeper the yellow colour of the gem, higher is the price. Additionally, the better the clarity of the stone the higher the price. Enhanced, heated or treated yellow sapphires, which are commonly found in the market today, are far less priced than the natural untreated stones. Untreated and unheated eye clean Ceylon sapphires (Sri Lankan) come in the range of $300 per carat to $600 per carat, but depending on the quality of the stone, it can far exceed this price range.

Markets and Producers of Yellow Sapphires

Yellow Sapphires roughThe finest bright yellow sapphire roughs  usually come from Sri Lanka. Indian market is very famous for selling ceylon sapphires of good clarity grade. As of 2007, Madagascar was leading the world production of sapphires. Sapphires are also mined in Thailand, Australia, USA (Montana), Burma, Pakistan, Afghanistan, India, Tanzania and Kenya.

Treated Yellow SapphireTreatments on Yellow sapphire

Treatments on yellow sapphire crystals of  natural origin are done to either lighten or darken the colour or to improve the clarity and transparency, in a bid to fetch a better price for the gem. However, it is ethically important for a dealer, to disclose the treatment done on the gemstones while trading. Even on close inspection of the gem many treatments are difficult to identify.

Ceylon Yellow SapphireAlmost a 60%-70% of the yellow sapphires sold in the market today are heat treated. Heat treatment is the treatment commonly done on yellow sapphires, to enhance their colour. The type of heat treatment done depends on the quality and location of the gemstones.

Heat treatment involves the heating of a gemstone at a temperature ranging from 450 C to 1900 C for a certain period of time (1 hour to 14 days) after which the stone goes through a cooling process, in order to improve its colour.

Pokhraj_gem_rough

The natural yellow sapphire and the beautiful red coloured rubybelong to the same family of gemstones, corundum, and have the same chemical composition – aluminum oxide. The cause of colour in  ruby is chromium, while that in sapphire is iron or titanium.

Source : gehnabazaar

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