Natural Nigerian Yellow Sapphire – 7.36 Ratti (6.70 Carat) Pukhraj Stone

Natural Nigerian Yellow Sapphire (Pukhraj Stone) – 6.70 Carat (7.36 Ratti) Oval Mix Cut

This Natural Nigerian Yellow Sapphire (Pukhraj Stone) weighs exactly 6.70 Carats (7.36 Ratti) with calibrated dimensions of 12 x 10 x 6 mm. Expertly faceted into a balanced Oval Mix Cut, this Earth-mined gemstone displays a vibrant golden-yellow hue, vitreous corundum luster, and balanced proportions ideal for fine jewelry mounting.

Mineralogical Identity & Physical Constants: Yellow Sapphire is the precious yellow variety of Natural Corundum (aluminum oxide, Al₂O₃), colored by color centers involving trace iron (Fe³⁺) substituting within the crystal lattice. Ranking at Mohs hardness 9.0 (second only to diamond), it exhibits superior scratch resistance and lifelong wearability. Under gemological testing, it demonstrates a refractive index of 1.762 to 1.770 (birefringence 0.008, uniaxial negative), a specific gravity of 3.99 to 4.01, and a diagnostic trigonal crystal system.

Geographical Origin & Lapidary Profile: Mined from the rich metamorphic corundum deposits of Nigeria (Africa), Nigerian yellow sapphires are prized for their warm golden-honey hues, remarkable crystal density, and lively natural fire. This gemstone is 100% natural, unheated, and untreated, exhibiting genuine natural crystal growth features without artificial heat modification or resin treatment.

Cultural Legacy & Traditional Wearing: Known in Sanskrit as Pushparaga / Guru Ratna and universally in Indian tradition as Pukhraj (पुखराज), Yellow Sapphire holds the preeminent position in Vedic astrology as the primary gemstone linked to Jupiter (Brihaspati / Guru / बृहस्पति). Traditionally, it is mounted in Yellow Gold, Panchdhatu, or Ashta Dhatu for rings and pendants worn on the index finger (Tarjani) of the working hand on Thursday mornings during Shukla Paksha.

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 lukewarm water, a mild dish soap solution, and a soft-bristled brush, then wipe dry with a lint-free microfiber cloth.
• Thanks to its Mohs 9 hardness, yellow sapphire is exceptionally durable and resistant to scratching, but should still be stored separately from diamonds and other gemstones to prevent surface scuffs.
• Avoid contact with harsh industrial chemicals, strong acids, or sudden direct thermal shock. Ultrasonic cleaning is generally safe for untreated and heated sapphires unless heavily fractured.

Frequently Asked Questions