Onyx Stone 6.10 Carat (6.70 Ratti)
SKU: SKU-5397
Sold-Out Piece · Permanent Certificate & Specification Record
This one-of-a-kind Onyx Stones piece (SKU: SKU-5397) has been sold. Its photographs, weight, and gemological record remain online for buyer verification. Browse currently available Onyx Stones pieces:
Gemstone & Physical Specifications
Details of this stone, with the standard gemological properties of its species.
- Weight
- 6.10 Carat (≈ 6.70 Ratti)
- Shape / Cut
- Octangle Shape
- Dimensions
- 12.5 x 10 x 6.5 mm
- Origin
- Indian
Detailed Product Description
Certified Natural Green Onyx Stone (Onex Ratna) – 6.10 Carat (6.70 Ratti) Oval Cut
This Certified Natural Green Onyx Stone (Onex Ratna) weighs exactly 6.10 Carats (6.70 Ratti) with calibrated dimensions of 12.5 x 10 x 6.5 mm. Cut and faceted into a polished Oval Cut, this Earth-mined chalcedony gemstone displays a refreshing, uniform green color with subtle natural translucency and a high-luster vitreous finish.
Mineralogical Identity & Physical Characteristics: Green Onyx belongs to the Microcrystalline Quartz (Chalcedony, SiO2) mineral group. Composed of microscopic interlocking quartz fibers, it exhibits a tough, aggregate structure without cleavage planes. Under gemological examination, it reveals a spot refractive index of 1.53 to 1.54, a specific gravity of 2.55 to 2.70, and a durable Mohs hardness of 6.5 to 7.0, providing excellent resistance to scratching and wear in daily jewelry mountings.
Cultural Legacy & Traditional Context: Known across Indian gem markets as Onex Ratna, Green Onyx is widely appreciated for its rich green tones. In traditional Vedic astrological systems, it is frequently chosen as an accessible secondary substitute (Upratna) for Natural Emerald (Panna) associated with Mercury (Budh). It is commonly mounted in Sterling Silver (925 Silver), Panchdhatu, or yellow gold for rings, pendants, and bracelets.
Please Note: Ratna Gems shares these historical, cultural, and gemological details solely for educational awareness. We sell all gemstones strictly on the basis of verified physical authenticity, mineral quality, and accredited laboratory certification, and make no astrological, metaphysical, or curative claims.
Care Instructions
- Clean gently with mild soap and lukewarm water, then dry with a soft microfiber cloth.
- Store separately to prevent surface scratching against harder gemstones such as sapphire, ruby, or topaz.
- Avoid exposure to harsh industrial chemicals, strong acids, ammonia, and high-temperature steam cleaning.
- For regular ring wear, a protective bezel or secure prong setting is recommended.
Frequently Asked Questions
How can I identify genuine Green Onyx Stone online?
Genuine Green Onyx should be clearly certified as a chalcedony-family quartz gemstone with exact carat weight, calibrated dimensions, facet cut, translucent green hue, and accredited gemological laboratory testing documentation. In the Indian lapidary trade, it is widely known as Onex Ratna or Green Onex.
Is this Green Onyx stone 100% natural and unheated?
Yes. This Green Onyx is 100% natural, Earth-mined microcrystalline chalcedony quartz with authentic natural color and an unheated status, accompanied by an accredited independent laboratory certificate.
How does Carat weight compare to traditional Ratti for this stone?
This gemstone weighs 6.10 Carats, corresponding to 6.70 Pakki Ratti (1 Carat = 200 mg; 1 Pakki Ratti ≈ 0.91 Carat). Both measurements are explicitly documented on your official laboratory test report.
How is this Green Onyx certified, and can I choose international laboratory testing?
Every Green Onyx gemstone includes an independent accredited gemological laboratory testing report verifying natural chalcedony quartz identity, weight, dimensions, specific gravity (2.55–2.70), refractive index (1.53–1.54), hardness (6.5–7.0), and natural untreated status. If you specifically require an additional report from GII, IIGJ or IGI, you can select it directly from the certification dropdown on this product page upon request (official laboratory testing fees apply in advance on a non-refundable basis).
How is Green Onyx different from Natural Emerald (Panna)?
Green Onyx belongs to the chalcedony (microcrystalline quartz) mineral species with a hardness of 6.5–7.0, whereas Emerald belongs to the beryl mineral family (beryllium aluminum silicate) with a hardness of 7.5–8.0. Green Onyx is frequently selected as an affordable astrological secondary substitute (Upratna) for Emerald, but it is distinct in chemical composition, crystalline structure, and value.
More from Onyx Stones
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.