Onyx Stone 4.00 Carat (4.40 Ratti)

Certified Natural Green Onyx Stone (Onex Ratna) – 4.00 Carat (4.40 Ratti) Oval Cut

This Certified Natural Green Onyx Stone (Onex Ratna) weighs exactly 4.00 Carats (4.40 Ratti) with calibrated dimensions of 12 x 9 x 6 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