Manik Stone 5.71 Ratti - 5.20 Carat Ruby Stone - Bangkok A1

Bangkok Ruby Stone (Manik) – 5.20 Carat (5.71 Ratti) Oval Mix Cut

This Bangkok Ruby Stone (Manik) weighs exactly 5.20 Carats (5.71 Ratti) with calibrated dimensions of 11 x 9 x 7 mm. Expertly faceted into a balanced Oval Mix Cut, this Earth-mined gemstone displays a deep, commanding red hue, vitreous corundum luster, and balanced proportions ideal for fine jewelry mounting.

Mineralogical Identity & Physical Constants: Ruby is the precious red variety of Natural Corundum (aluminum oxide, Al₂O₃), colored by trace chromium (Cr³⁺) substituting for aluminum in 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: Cut and finished in Bangkok, Thailand—the premier international lapidary hub for colored gemstones—this ruby exhibits excellent symmetry, balanced crown angles, and deep royal red saturation. It has undergone traditional heat treatment, a permanent, widely accepted industry standard that stabilizes color and dissolves excess internal silk while preserving genuine natural corundum structure.

Cultural Legacy & Traditional Wearing: Known in Sanskrit as Manikya or Ratnaraj (“King of Gems”) and universally in India as Manik (माणिक), Ruby holds a revered position in Vedic astrology as the primary gemstone linked to the Sun (Surya / सूर्य). Traditionally, it is mounted in Yellow Gold, Panchdhatu, or Copper for rings and pendants worn on the ring finger (Anamika) of the working hand on Sunday 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, ruby is exceptionally durable and scratch-resistant, 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 rubies unless heavily fractured.

Frequently Asked Questions