Ruby Stones (Manik Ratna)

Mozambique Ruby: Mined primarily in the Montepuez region of Mozambique, these rubies are globally renowned for their rich crimson to “pigeon blood” red colors, exceptional crystal transparency, and vivid natural fluorescence. Our Mozambique rubies are listed as natural and unheated, which gives them high collector value.

African Ruby: Sourced from deposits across East Africa (including Madagascar, Tanzania, and Kenya), African rubies display deep red to purplish-red hues with dense crystalline structure. They offer genuine, natural unheated corundum with substantial presence at an accessible price per carat.

Bangkok (Thailand) Ruby: Bangkok is a trade name, after the Thai gem-trading center, not a mine. Our Bangkok rubies are heated and glass-filled: heating improves the red, and glass fills fine fissures that reach the surface. They are an economical, popular choice, and many customers wear them on their astrologer’s or Pandit ji’s advice; they need gentle care (no ultrasonic cleaning, acids or jeweler’s torch). Learn more in our Ruby (Manik) Buying Guide.

Our Mozambique and African Rubies are natural and unheated. They preserve their original crystal growth structures, natural rutile silk needles, and distinct hexagonal color zoning untouched by thermal or chemical alterations.

For buyers seeking affordable options, our collection also includes Bangkok rubies, which are heated and glass-filled: heating improves the color, and glass fills fine fissures that reach the surface. Every one states this in its specifications.

Every Ruby (Manik) at Ratna Gems is individually tested and certified by an independent gemological laboratory. The official gem-testing report confirms the mineral species (Natural Corundum), gemstone variety (Natural Ruby), precise carat weight, refractive index (1.762–1.770), specific gravity (3.99–4.01), hardness (9 on Mohs scale), and full treatment disclosure (Untreated Natural Corundum vs. Heated/Filled). Each certificate includes a unique report ID and QR code verifiable directly on the testing laboratory’s official online portal.

Lab Report Included: Every gemstone comes with an independent laboratory report at no extra charge. If you specifically require an additional report from GII, IIGJ, or IGI, you can select it directly from the certification dropdown on any product page upon request (official laboratory testing fees apply in advance on a non-refundable basis).

In Indian trade and traditional contexts, gemstone weight is frequently specified in Ratti, whereas international gemological testing laboratories measure weight strictly in Carats (ct):

• 1 Carat = 200 milligrams (0.20 grams).
• 1 Traditional Sunari Ratti ≈ 0.91 Carats (approx. 182 milligrams).
• 1 Pakki / Standard Ratti ≈ 0.96 Carats.

To ensure full transparency, Ratna Gems presents both exact Carat weight and traditional Ratti equivalents across all product descriptions, specification tables, and laboratory certificates. For detailed sizing guidelines, consult our Ruby (Manik) Buying Guide.

For customers observing classical Indian customs, traditional literature outlines the following customary conventions:

• Customary Metals: Yellow Gold, Copper, Panchdhatu, or Ashta Dhatu alloys are traditionally favored.
• Traditional Placement: Customarily worn on the ring finger (Anamika) of the working hand.
• Traditional Timing: Customary traditions often observe Sunday mornings at sunrise during the waxing moon (Shukla Paksha).
• Traditional Substitutes (Upratna): Classical texts traditionally cite natural Red Spinel (Lal Spinel) or Red Garnet (Raktamani) as accessible historical alternatives.