Bangkok Yellow Sapphire (Pukhraj Stone) 8.25 Carat (9.07 Ratti) Octagon Step Cut
SKU: GS12220448636
Gemstone & Physical Specifications
Details of this stone, with the standard gemological properties of its species.
- Weight
- 8.25 Carat (≈ 9.07 Ratti)
- Shape / Cut
- Octagon Step Cut
- Treatment
- Heat treated & Glass filled
- Hardness
- 9.0
- Fluorescence
- Inert to Moderate
- Certification Lab
- Neel Gems Testing Lab
- Dimensions
- 13.1 x 9.1 x 6.9 mm
- Origin
- Bangkok (Thailand)
- Color
- Yellow
- Refractive Index (R.I.)
- 1.76 - 1.77
- Conclusion / Identification
- Yellow Sapphire (Corundum)
- Certificate / Report No.
- GS12220448636
Detailed Product Description
This Bangkok Yellow Sapphire (Pukhraj Stone) weighs 8.25 Carat (9.07 Ratti), measuring 13.1 x 9.1 x 6.9 mm, with a yellow colour and an octagon step cut. It has been heated and glass-filled, and it comes with a lab report from Neel Gems Testing Lab, which identifies it as yellow sapphire (corundum).
Yellow sapphire, known in India as Pukhraj (also spelt Pokhraj), is the yellow variety of corundum, a colour that traces of iron give the mineral. In the Indian gem trade, Bangkok is the name for corundum of this kind, after the Thai gem-trading centre where much of the world's corundum is treated and traded: it describes how the stone was processed, not where it was mined. Heating improves the colour, and glass fills fine fissures that reach the surface so that they show less. This is why a Bangkok Yellow Sapphire shows a rich colour at a fraction of the price of an untreated stone.
Appearance
This stone's report records its colour as yellow. Yellow sapphire can show inclusions, fine silk, colour zoning or small variations in shade, and in a glass-filled stone the filled fissures can show a flash of colour and small gas bubbles under magnification. The photos and video show this stone's own colour, cut and character.
Traditional Use
In Vedic astrology, yellow sapphire (Pukhraj) is traditionally associated with Jupiter (Guru or Brihaspati), and it is one of the nine gems of the Navratna. Many of our customers wear a Bangkok Yellow Sapphire on their astrologer's or Pandit ji's advice; views on treated stones differ, so customers buying for astrological use usually ask their own astrologer or Pandit ji whether a heated, glass-filled yellow sapphire is right for them. Sapphire, in yellow and other colours as well as blue, is also the September birthstone.
Care
Corundum is 9 on the Mohs scale, but the glass that fills this stone's fissures is much softer, so a little gentle care keeps it looking its best. Wipe it with a soft, damp cloth, dry it with a lint-free cloth, and store it apart from diamonds and other stones. Keep it away from ultrasonic and steam cleaners, household acids such as lemon juice and vinegar, bleach, ammonia and detergents, and take it off before sport, housework or using cleaning products. Before any setting, resizing, repair or re-polishing, tell your jeweller it is glass-filled, so that it is kept away from the torch and the pickling solution.
Compare similar stones in our Yellow Sapphire (Pukhraj Stone) collection, or read the Yellow Sapphire (Pukhraj) buying guide.
Frequently Asked Questions
Is this Bangkok Yellow Sapphire natural, and what treatment has it received?
Its lab report identifies it as yellow sapphire (corundum), the mineral of every ruby and sapphire, and the word "natural" on the report means it is not synthetic. Like every Bangkok Yellow Sapphire we sell, it has been heated and glass-filled, and we say so openly: heating improves the colour, and glass fills fine fissures that reach the surface so that they show less. It is sold as a treated stone, not an untreated one, which is why it offers a rich colour at a fraction of the price of an untreated yellow sapphire.
What does Bangkok Yellow Sapphire mean in this listing?
In the Indian gem trade, Bangkok is the name for heated, glass-filled corundum of this kind, after the Thai gem-trading centre. It describes how the stone was processed, not where it was mined.
Why are Bangkok Yellow Sapphires so widely chosen?
A Bangkok Yellow Sapphire gives a rich yellow colour in a good size at a fraction of the price of an untreated stone. It is a popular choice in India, and many of our customers wear one on their astrologer's or Pandit ji's advice. Being glass-filled, it simply needs the gentle care described above.
Which planet is Pukhraj associated with?
In Vedic astrology, Pukhraj is traditionally associated with Jupiter (Guru or Brihaspati). This is a traditional belief, not a promise of any result. Views on treated stones differ, so customers usually ask their astrologer or Pandit ji whether a heated, glass-filled yellow sapphire is right for them.
Can this Pukhraj be set in jewellery?
Yes. At 13.1 x 9.1 x 6.9 mm it suits a ring or pendant. Share the dimensions with your jeweller and say that it is glass-filled, so that the setting is made without a torch or pickling solution on the stone.
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Customer Reviews
Verified feedback across our certified Yellow Sapphire (Pukhraj Stone) collection. Because each natural gemstone is rare and one-of-a-kind, reviews reflect genuine patron experiences with this gemstone family.