Lapis Lazuli (Lajward Stone)

Lapis Lazuli, historically celebrated as Lajward in Sanskrit and Persian gemology, is scientifically classified as a contact-metamorphic rock rather than a single mineral species:

• Mineral Composition: The characteristic royal-to-ultramarine blue color is provided by Lazurite, a complex sulfur-bearing feldspathoid mineral ((Na,Ca)₈(AlSiO₄)₆(SO₄,S,Cl)₂). The blue rock host is naturally intergrown with sparkling brass-yellow flecks of Pyrite (iron disulfide, FeS₂) and white crystalline veins of Calcite (calcium carbonate, CaCO₃), alongside minor sodalite, diopside, or wollastonite.
• Gemological Grading: High-grade lapis lazuli features an intense, uniform royal azure blue with evenly scattered, glittering pyrite specks and minimal to zero dull white calcite banding. Read our comprehensive Lapis Lazuli (Lajward) Buying Guide for complete origin and grading criteria.

Because inexpensive blue minerals and synthetic polymers are frequently substituted for natural lapis lazuli, accredited gemologists look for several diagnostic markers:

• Embedded Pyrite vs. Surface Glitter: In genuine natural lapis lazuli, pyrite crystals are embedded three-dimensionally within the rock matrix, displaying sharp crystalline facets and true metallic brassy luster. Cheap imitations often use surface paint or brass shavings that flake off easily.
• Acetone Dye Test: Dyed blue jasper (“Swiss Lapis”) or color-treated low-grade chalcedony will release artificial blue color onto an acetone-soaked cotton swab. 100% natural untreated lapis lazuli leaves the swab completely clean.
• Density & Temperature: Genuine lapis lazuli has a specific gravity of 2.70 to 2.90 and feels cool to the initial touch. Polymer resin or plastic imitations feel noticeably lighter, warm quickly in the hand, and emit a chemical odor under hot needle testing.
• The Ratna Gems Guarantee: Every Lapis Lazuli stone at Ratna Gems is guaranteed 100% natural, Earth-mined, unheated, and completely undyed, verified by accredited gemological laboratory testing.

Every Lapis Lazuli (Lajward) gemstone sold by Ratna Gems is individually tested and accompanied by an independent accredited gemological laboratory testing report. The certificate identifies the rock type as Natural Metamorphic Rock (Lapis Lazuli), major constituent minerals as Lazurite with Pyrite and Calcite, exact carat and ratti weight, dimensions, specific gravity (2.70–2.90), refractive index (spot reading ~1.50 from lazurite), hardness (5.0–5.5 on Mohs scale), confirms diagnostic natural mineral texture, and verifies untreated, undyed natural status. Each report includes a unique certificate number and verifiable QR code for direct verification on the issuing laboratory’s official portal.

Optional International Certification: Every gemstone includes an independent accredited laboratory certificate at no 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).

With a Mohs hardness of 5.0 to 5.5 and a porous multi-mineral structure, Lapis Lazuli requires specialized care to preserve its deep blue surface polish:

• Acid & Chemical Vulnerability: Because lapis lazuli contains calcite and lazurite, contact with domestic acids (vinegar, lemon juice, cosmetic fruit acids) or harsh household cleaners will etch the surface, turning the mirror-like polish dull. Contact with dilute acids can decompose lazurite, releasing a faint hydrogen sulfide odor.
• Avoid Thermal & Ultrasonic Shock: Never use ultrasonic devices, boiling water, or high-pressure steam cleaners. The porous aggregate structure absorbs liquids readily, and ultrasonic vibrations can loosen the calcite and pyrite grain boundaries.
• Safe Cleaning: Wipe gently with a soft, lint-free cloth slightly moistened with lukewarm distilled water. Pat dry immediately with a clean towel. Store separately in an individual soft fabric pouch away from harder minerals like quartz, beryl, and sapphires.

With an archaeological legacy spanning over 6,000 years from ancient Sumer and Egypt to traditional Indian Vedic lapidary, historical literature outlines the following customary conventions:

• Customary Metals: Sterling Silver (925 Silver), White Gold, or Panchdhatu alloys are traditionally considered ideal mounting metals to showcase the contrast between royal blue lazurite and golden pyrite flecks.
• Traditional Placement: Customarily worn as a cabochon signet ring on the middle finger (Madhyama) of the working hand, or as a protective pendant resting near the throat or chest.
• Traditional Timing: Often set or worn on Saturday evenings during Shukla Paksha (waxing moon) around sunset.
• Traditional Role (Upratna): Historically revered in classical Sanskrit texts as Lajward, recognized as the primary traditional substitute (Upratna) for Natural Blue Sapphire (Neelam) associated with Saturn (Shani).

Please Note: Ratna Gems shares these details solely for cultural and informational awareness for customers seeking traditional jewelry. We sell all gemstones strictly on the basis of verified physical authenticity, mineral quality, and certified origin, and make no astrological, metaphysical, or medical claims.