Bangkok Blue Sapphire (Neelam) 3.86 Carat — Authentic Blue Oval Mix Cut
This Bangkok Blue Sapphire (Neelam) 3.86 Carat (4.24 Ratti) is a natural, lab-certified sapphire featuring a refined oval mix cut and an attractive blue colour. With a well-proportioned face-up size of 10.3 × 7.7 mm and a depth of 4.8 mm, it is an excellent choice for elegant rings and pendants that offer strong presence without feeling oversized.
Bangkok is internationally known as a major sapphire trading and cutting hub. This gemstone is heated and treated, a globally accepted, permanent enhancement used to improve colour and clarity while maintaining the stone’s natural corundum structure.
Gemstone Specifications
| Gemstone Type | Natural Blue Sapphire (Neelam / नीलम) |
| Weight | 3.86 Carat (4.24 Ratti) |
| Dimensions | 10.3 × 7.7 × 4.8 mm |
| Shape/Cut | Oval 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 3.86 Carat Neelam is a Great Choice
A near 4-carat natural Blue Sapphire offers an excellent balance of presence and wearability. The oval shape gives strong finger coverage, while the mix cut enhances brilliance and sparkle — making it a genuine and elegant option for jewellery as well as traditional preferences.
Video Inspection
Watch the 360° video of this exact gemstone to review colour, clarity, and cut performance before purchase. The video is recorded under neutral lighting for accurate 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
The certificate confirms this stone as an authentic natural Blue Sapphire with disclosed heat treatment.
Natural Characteristics
Natural inclusions or internal growth patterns may be present and are common in natural sapphires. These features help gemologists confirm natural origin and distinguish natural stones from synthetic or imitation materials.
Browse More Blue Sapphire Options
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New to buying Blue Sapphire? Read our comprehensive guide first:
Blue Sapphire (Neelam) Buying Guide
Our 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 |
