Green Onyx Stone (Onex Ratna) 5.26 Carat (5.78 Ratti) Oval Cut
SKU: TSGTL3579
Gemstone & Physical Specifications
Details of this stone, with the standard gemological properties of its species.
- Weight
- 5.26 Carat (≈ 5.78 Ratti)
- Shape / Cut
- Oval Cut
- Color
- Green
- Species / Mineral
- Natural Chalcedony (Quartz)
- Refractive Index (R.I.)
- 1.53 - 1.54
- Fluorescence
- None
- Certification Lab
- The Standard Gem Testing Laboratory (An ISO 9001-2015 Certified Laboratory)
- Dimensions
- 13.3 x 10.5 x 5.8 mm
- Origin
- Indian
- Transparency / Clarity
- Translucent
- Hardness
- 6.5 - 7.0
- Specific Gravity (S.G.)
- 2.55 - 2.70 (approx.)
- Conclusion / Identification
- Natural Quartz
- Certificate / Report No.
- TSGTL3579
Detailed Product Description
This Green Onyx Stone (Onex Ratna) weighs 5.26 carat (5.78 ratti) and measures 13.3 x 10.5 x 5.8 mm, with a green colour and an oval cut. It is of Indian origin. It comes with a lab report from The Standard Gem Testing Laboratory, which identifies it as natural quartz and names it green onyx.
Onyx, known in India as Onex Ratna, is a variety of chalcedony, the fine-grained form of quartz (silicon dioxide). Strictly, onyx is chalcedony with straight, parallel bands; in jewellery, Green Onyx means evenly green chalcedony. In the trade, dyeing green chalcedony with chromium or nickel salts is a long-established, accepted practice that gives much green onyx its even colour, while some green chalcedony is naturally coloured; only laboratory testing can tell the two apart.
Appearance
This faceted oval shows a green colour with a bright, glassy polish. Chalcedony can look softly translucent or faintly cloudy in strong light, which is part of the material's character, not damage. The photos and video show this stone's colour, polish and proportions, so you see exactly what you will receive.
Traditional Use
In Vedic astrology, Green Onyx is traditionally associated with Mercury (Budh) and is often chosen as a Panna Substitute (Upratna) for Emerald (Panna). Green Onyx and Emerald are different gemstones. Customers buying it for astrological use usually follow their astrologer's or Pandit ji's guidance.
Care
Onyx is about 6.5 to 7 on the Mohs scale and has no cleavage, so it suits a ring or pendant, and a few easy habits keep it looking its best. Clean it gently with lukewarm water, mild soap and a soft cloth, and dry it straight away. Keep it away from knocks that could chip a facet edge, and, because much onyx is dyed, from acetone, nail polish remover, alcohol, bleach, perfume and other harsh chemicals, long periods in strong sunlight, and steam or ultrasonic cleaning. Store it separately in a soft pouch, and take a ring off for heavy work or sport.
Explore more pieces in the Onyx Stones collection, or read the Onyx Stone buying guide.
Frequently Asked Questions
What does the lab report say about this Green Onyx?
The report from The Standard Gem Testing Laboratory identifies this stone as natural quartz, names it green onyx, and records its weight of 5.26 carat (5.78 ratti), dimensions of 13.3 x 10.5 x 5.8 mm, green colour, oval cut, refractive index, specific gravity, and hardness.
Is green onyx dyed?
Much of it is, as a long-established and accepted trade practice: green onyx is often chalcedony dyed with chromium or nickel salts for its even colour, while some green chalcedony is naturally coloured. Telling them apart takes laboratory testing, not a home test. Because a dyed colour can be affected by solvents and strong sunlight, the easy-care tips above are written to suit any green onyx.
Is Green Onyx the same as Emerald (Panna)?
No. Green Onyx is chalcedony, a form of quartz, while Emerald (Panna) is beryl, a different and harder gemstone. In Vedic tradition Green Onyx is chosen as a Panna Substitute (Upratna), but it is not an emerald; a laboratory tells them apart by refractive index and specific gravity.
Which planet is Green Onyx associated with?
Mercury (Budh). In Vedic astrology, Green Onyx is traditionally associated with this planet. This is a traditional belief, not a promise of any result, and customers usually follow their astrologer's or Pandit ji's guidance.
Can this Green Onyx be set in a ring or pendant?
Yes, at 13.3 x 10.5 x 5.8 mm it suits a ring or pendant. Share the dimensions with your jeweller so the setting is made to fit the stone, and the easy-care tips above will keep it looking its best.
More from Onyx Stones
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Green Onyx Stone (Onex Ratna) 5.83 Carat (6.41 Ratti) Octagon Cut
Green Onyx Stone (Onex Ratna) 8.25 Carat (9.07 Ratti) Octagon Step Cut
Customer Reviews
Verified feedback across our certified Onyx Stones collection. Because each natural gemstone is rare and one-of-a-kind, reviews reflect genuine patron experiences with this gemstone family.