Bangkok Blue Sapphire (Neelam) 12.86 Carat (14.13 Ratti) — Octagon Cut
SKU: SKU-15898
Lab-certified Natural Bangkok Blue Sapphire (Neelam) 12.86 Carat (14.13 Ratti) — a statement-size Thailand Neelam with impressive 13.7 × 10.9 mm spread. This octagon mix cut sapphire displays rich blue colour and is heated & treated as per industry-standard practice.
Traditionally associated with Saturn (Shani) in Vedic astrology, Blue Sapphire is considered the gemstone for Makar (Capricorn) and Kumbh (Aquarius) rashi. Consult your astrologer for personal suitability.
Includes: Independent lab certificate from ISO 9001:2015 certified laboratory, secure tamper-evident packaging.
Specifications: Authentic Blue Sapphire (Neelam) | 12.86 Ct / 14.13 Ratti | Octagon Cut | Blue | Heated & Treated | Hardness 9 | R.I. 1.76-1.77
Detailed Product Description
Bangkok Blue Sapphire (Neelam) 12.86 Carat — Premium Thailand Origin
This Bangkok Blue Sapphire (Neelam) 12.86 Carat (14.13 Ratti) is a lab-certified natural sapphire of exceptional size, expertly cut and processed in Bangkok's world-renowned gem facilities. At nearly 13 carats with an impressive 13.7 × 10.9 mm face-up spread, this is a statement-size Neelam (बैंकॉक नीलम) that commands attention — ideal for a signature ring, pendant, or serious gemstone collection. Bangkok serves as the global hub for sapphire cutting and treatment, where master craftsmen transform rough material into polished gems using techniques refined over generations. The heated and treated status is standard industry practice — a permanent enhancement accepted worldwide that improves colour saturation and clarity without altering the stone's natural corundum structure.Gemstone Specifications
| Gemstone Type | Natural Blue Sapphire (Neelam / नीलम) |
| Weight | 12.86 Carat (14.13 Ratti) |
| Dimensions | 13.7 × 10.9 × 7.5 mm |
| Shape/Cut | Octagon Mix Cut |
| Colour | Blue |
| Origin | Bangkok, Thailand (Traded & Processed) |
| Treatment | Heated & Treated (Industry Standard) |
| Hardness | 9 on Mohs Scale |
| Refractive Index | 1.76 – 1.77 |
| Chemical Composition | Al₂O₃ (Corundum) |
| Certification | Lab Certified (ISO 9001:2015 Certified Laboratory) |
| Conclusion | Natural Blue Sapphire |
Why This 12.86 Carat Size Matters
Natural Blue Sapphires above 10 carats are uncommon in the certified gemstone market. This 12.86-carat Bangkok Neelam offers exceptional value for buyers seeking a large, certified stone without the premium pricing of unheated Ceylon or Kashmir origins. The generous 13.7 × 10.9 mm spread ensures the gemstone makes a bold visual statement when mounted in jewellery.Video Inspection
Watch the detailed 360° video of this exact stone to examine colour, clarity, cut quality, and light performance from every angle before purchase. The video is shot under neutral lighting conditions for accurate colour representation.Certification and Authenticity
Every gemstone from Ratna Gems includes:- Lab Certificate from an ISO 9001:2015 Certified Gems Testing Laboratory
- Lifetime Authenticity Guarantee — we stand behind every stone we sell
- Certificate Verification — verify your report directly with the issuing laboratory
Natural Characteristics
Minor natural inclusions, silk, colour zoning, or internal growth patterns may be visible under magnification. These are natural identifying characteristics that help gemologists confirm the stone is genuinely natural and distinguish it from synthetic or imitation materials. Such features are normal in natural gemstones and do not indicate defects.Browse More Blue Sapphire Options
Explore our complete collection of certified Blue Sapphire (Neelam) stones: View All Blue Sapphire (Neelam) Stones New to buying Blue Sapphire? Read our comprehensive guide first: Blue Sapphire (Neelam) Buying GuideOur Commitment to You
| Certification | Lab report from ISO 9001:2015 Certified Laboratory + Lifetime Authenticity Guarantee |
| Returns | 7-day easy return from delivery. See our Return & Refund Policy |
| Shipping | Free insured shipping across India with tracking |
| Packaging | Secure, tamper-evident packaging |
| Payment | COD available | Secure online payment options |
| Support | WhatsApp assistance for any queries |
Frequently Asked Questions
This is a 100% natural Blue Sapphire, confirmed by laboratory certification. The stone has undergone heat treatment, which is a standard, accepted practice in the gemstone industry that enhances colour and clarity permanently.
- Makar Rashi (Capricorn / मकर राशि) natives
- Kumbh Rashi (Aquarius / कुंभ राशि) natives
- Those experiencing Shani Sade Sati period
- Shani Mahadasha or Shani Dhaiya phases
- Day: Saturday (Shanivar / शनिवार)
- Time: Morning during Shukla Paksha
- Finger: Middle finger of working hand
- Metal: Silver, White Gold, or Panchdhatu
- Weight Formula: Body weight (kg) ÷ 12 = Ratti
- Mantra (Optional): Om Sham Shanicharaya Namah (108 times)
Bangkok Blue Sapphires offer excellent value compared to premium origins like Kashmir, Ceylon, or Burma. Price differences reflect market positioning, origin premiums, and supply chains. Bangkok serves as a major trading hub where sapphires from various sources are cut and processed, often resulting in competitive pricing while maintaining quality standards.
Ceylon (Sri Lanka) sapphires are typically priced higher due to their reputation for exceptional colour and clarity. Bangkok sapphires offer similar beauty at more accessible price points, making them popular for both jewellery and astrological purposes.
Every stone comes with a lab certificate from an ISO-certified laboratory. You can verify the certificate number directly with the issuing lab. Additionally, natural sapphires display characteristic inclusions and properties that trained gemologists can identify.
Traditional recommendations suggest Silver, White Gold, or Panchdhatu for Blue Sapphire. The choice often depends on personal preference, skin sensitivity, and any specific guidance from your astrologer.
Yes, we offer a 7-day easy return policy from the date of delivery. Please review our Return & Refund Policy for complete terms and conditions.
Heat treatment is widely accepted in the gemstone trade and does not change the stone's natural identity. Many practitioners consider heated natural sapphires suitable for astrological use. For specific guidance, consult your astrologer.
A traditional formula suggests dividing your body weight in kg by 12 to get the recommended weight in Ratti. For example, a 72 kg person would require approximately 6 Ratti. However, individual recommendations may vary based on astrological consultation.
Ratna Gems specializes in loose certified gemstones and does not currently offer custom jewellery services. You can have this stone set by your trusted local jeweller.
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