Natural Red Mahenge Spinel 6.7 carats, GRS certified
$15,585.00
Bring home an extraordinary collector’s piece with this magnificent 6.70-carat natural spinel, certified by the esteemed Gemresearch Swisslab (GRS). Featuring a vivid, lively color and an impressive size, this gemstone is an exceptional…
1 in stock
- Delivery & ReturnTHE MAS GEMS DIFFERENCEGlobal Online JewellerHallmarkCertifiedRated 4.7/5 GloballyFree Shipping & Free 15-Day ReturnsLifetime Exchange & Buyback
Bring home an extraordinary collector’s piece with this magnificent 6.70-carat natural spinel, certified by the esteemed Gemresearch Swisslab (GRS). Featuring a vivid, lively color and an impressive size, this gemstone is an exceptional find for high-end jewelry or a serious investment portfolio.
Key Specifications:
Report Number: GRS2026-040969
Identification: Natural Spinel
Weight: 6.70 ct
Dimensions: 14.65 x 10.60 x 5.93 mm
Cut / Shape: Modified brilliant/step (6) / Pear
Color: Orange-red
Comments: No indication of thermal treatment (PL tested)
Origin: Tanzania
Why Choose This Gemstone?
100% Untreated: Completely natural and unheated, preserving its pure geological beauty and intrinsic value.
Exceptional Presence: At 6.70 carats with balanced pear dimensions (14.65 x 10.60 mm), it makes a breathtaking centerpiece for a custom ring or pendant.
Trusted Certification: Backed by official GRS laboratory documentation verifying its origin and untreated status.
Shipping & Customer Care:
Packaging: Securely shipped and fully insured in a premium presentation box.
Support: Feel free to reach out with any questions or if you would like to discuss bespoke mounting options.
Related Products
| Feature / Detail | Specification |
| Item | 10.95-Carat Natural Spinel |
| Report Number | GRS2025-041392 |
| Certification | Gemresearch Swisslab (GRS) |
| Weight | 10.95 ct |
| Dimensions | 13.40 x 9.68 x 9.59 mm |
| Cut / Shape | Modified brilliant/step (6) / Rectangular cushion |
| Color | Orangy-pink |
| Treatment | No indication of thermal treatment (PL tested, non-enhanced clarity features present / 100% untreated) |
| Origin | Tanzania |
| Packaging & Shipping | Securely shipped and fully insured in a premium presentation box |
| Support | Available for inquiries and custom jewelry manufacturing options |
| Specification | Details |
| Gem Type | Natural Spinel |
| Origin | Mahenge, Tanzania |
| Weight | 1.2 Carats |
| Dimensions | 7.1 x 5.24 x 3.89 mm |
| Shape/Cut | Oval |
| Color | Neon Pink / Hot Red |
| Clarity | Slightly Included |
| Treatment | None (100% Natural & Untreated) |
| Category | Details |
|---|---|
| Gemstone | Natural Mahenge Spinel |
| Carat Weight | 1.26 ct |
| Color | Vivid Neon Pink (High Saturation) |
| Cut / Shape | Oval Brilliant |
| Dimensions | 7.26 × 6.05 × 3.13 mm |
| Clarity | Eye Clean (Excellent Transparency) |
| Treatment | None (Completely Unheated & Untreated) |
| Origin | Mahenge 🇹🇿 |
| Special Features | Strong neon glow, exceptional brilliance, vivid pink-to-reddish sparkle |
| Investment Appeal | Rare natural spinel with increasing collector and investor demand |
| Best For | Engagement rings, halo settings, pendants, luxury custom jewelry |
| Suggested Designs | Solitaire ring, diamond halo setting, timeless pendant |
| Sourcing | Ethically sourced directly from mining operations |
| Inspection & Shipping | Hand-selected and shipped from Bangkok |
| Shipping | Worldwide tracked and insured delivery in a premium display case |
| Feature / Category | Details |
| Gemstone Name | Natural Vivid Red Mahenge Spinel |
| Weight | 1.67 Carats |
| Gem Type | Natural Spinel |
| Origin | Mahenge, Tanzania |
| Shape | Oval Cut |
| Dimensions | 8.66 x 6.5 x 3.71 mm |
| Color | Vivid Red (fiery hue between hot pink and pigeon-blood red) |
| Clarity | Included minor natural character (classic for Mahenge origin) |
| Treatment | None (100% Natural & Unheated) |
| Key Highlights | • Extraordinary “electric” saturation and high refractive index (“light bulb” glow) • Investment grade (depleting mines drive appreciation) • Versatile design suitable for engagement rings or pendants |
| Shipping & Extras | • Secure, insured worldwide shipping • Premium gemstone display box included • Authenticity guarantee |
| Feature / Specification | Details |
| Weight | 1.76 Carats |
| Gem Type | Natural Spinel |
| Origin | Mahenge, Tanzania |
| Color | Grape Purple / Deep Plum (with magenta and lavender flashes) |
| Shape | Oval |
| Dimensions | 8.59 x 5.49 x 4.66 mm |
| Clarity | Slightly Included |
| Treatment | No Heat / No Treatment (100% Natural) |
| Optical Properties | Singly refractive with exceptional luster and “velvety” saturation |
| Design Recommendations | Pairs well with Rose Gold (brings out warm magenta undertones) or White Gold/Platinum (emphasizes violet primary hue) |
| Authenticity | Ethically sourced and 100% natural |
| Category | Detail / Feature |
| Gemstone Overview | Natural Pink-Purple Mahenge Spinel (0.16 Carat Oval Cut) |
| Visual Characteristics | Captivating blend of vibrant pink and purple tones with a striking flash, exceptional brilliance, and rich electric color. |
| Gemstone Type | Natural Spinel |
| Weight | 0.16 Carats |
| Shape / Cut | Oval Cut |
| Color | Pink-Purple |
| Clarity | Eye Clean |
| Treatment | None (100% Unheated / Untreated) |
| Origin | Mahenge, Tanzania |
| Key Highlights | Untouched purity with zero heat treatments, famous Mahenge glow with unique color shifts and incredible fluorescence, and versatile jewelry-ready cut. |
| Ideal Uses | Custom minimalist ring, delicate accent stone, or vibrant addition to a multi-stone cluster design. |
| Packaging & Presentation | Securely packaged in a premium gemstone display box. |
| Shipping | Tracked and insured shipping worldwide. |
1 in stock
| Attribute | Description |
|---|---|
| Gemstone | Natural Mahenge Spinel |
| Origin | Mahenge, Tanzania |
| Weight | 8.19 carats |
| Color | Light Red |
| Clarity | Transparent |
| Measurement | 14 mm x 9.6 mm x 6.2 mm |
| Shape | Emerald Cut |
| Specification | Details |
| Gem Type | Natural Spinel |
| Origin | Mahenge, Tanzania |
| Weight | 1.27 Carats |
| Dimensions | 7.66 x 4.5 x 3.65 mm |
| Shape/Cut | Baguette / Emerald Step-Cut |
| Color | Electric Neon Pink |
| Clarity | SI (Slightly Included) |
| Treatment | 100% Natural (Unheated & Untreated) |
| Category | Details |
|---|---|
| Gemstone | Natural Mahenge Spinel |
| Carat Weight | 1.18 ct |
| Color | Rich Pinkish-Purplish / Deep Neon Pink |
| Cut / Shape | Rectangular Cushion |
| Dimensions | 7.3 × 5.05 × 3.89 mm |
| Clarity | VVS |
| Treatment | None (100% Natural & Untreated) |
| Origin | Mahenge |
| Special Features | Deep neon undertone, strong brilliance, vivid glow in low light |
| Optical Properties | Singly refractive for pure and crisp color flashes |
| Best For | Custom rings, luxury jewelry, gemstone collections |
| Collector Appeal | Prestigious Mahenge origin with rare saturated pink-purple hue |
| Presentation | Professional gemstone display box |
| Shipping | Fully insured worldwide shipping with real-time tracking |
| Attribute | Details |
|---|---|
| Gemstone | Mahenge Spinel |
| Shape | Heart |
| Carat Weight | 3.37 ct |
| Color | Orange-Red |
| Origin | Mahenge, Tanzania |
| Measurements | 9.37 mm x 11.5 mm x 4.75 mm |
| Category | Detail / Feature |
| Gemstone Overview | Natural Cobalt Blue Spinel (0.09 Carat Oval Cut) |
| Visual Characteristics | Bright, crisp sky blue tone with a lively, electric play of light, sharp faceting, and excellent clarity. |
| Stone Type | Natural Cobalt Spinel |
| Weight | 0.09 Carats |
| Color | Bright Sky Blue / Cobalt Blue |
| Origin | Mahenge, Tanzania |
| Shape / Cut | Oval Cut (Faceted) |
| Dimensions | 3.39 x 2.4 x 1.45 mm |
| Clarity | Eye-Clean |
| Treatment | Unheated / Untreated (100% All-Natural) |
| Key Highlights | Cobalt-driven open blue hue, sourced from the renowned Mahenge region, 100% unheated purity, and ideal for precision custom jewelry. |
| Ideal Uses | Delicate accent stone in a multi-gem layout, custom ring accent, or a fine addition to a mineral capsule collection. |
| Packaging & Presentation | Shipped safely in a premium gemstone specimen box designed for viewing, presentation, and long-term protection. |
| Shipping | Fully trackable, insured express courier worldwide. |
| Custom Jewelry Service | Bespoke design services available to collaborate with their team and turn the gemstone into custom fine jewelry. |
1 in stock
| Category | Detail / Feature |
| Gemstone Overview | Natural Blue Mahenge Spinel (0.30 Carats Round Cut) |
| Visual Characteristics | Bright, open sky-to-cornflower blue color accented by gentle, reflective light play, crisp clear brilliance, and subtle violet-blue flashes. |
| Stone Type | Natural Blue Spinel |
| Weight | 0.30 Carats |
| Color | Bright Sky Blue |
| Origin | Mahenge, Tanzania |
| Shape / Cut | Round Cut (Faceted) |
| Dimensions | 3.99 x 2.64 mm |
| Clarity | Slightly Included |
| Treatment | Unheated / Untreated (100% All-Natural) |
| Key Highlights | Soft bright color profile avoiding dark inkiness, precision round cut with excellent symmetry, renowned Mahenge locality, and 100% all-natural purity. |
| Ideal Uses | Delicate solitaire ring center, exquisite accent stone in a multi-stone ring layout, or a premium addition to a capsule gemstone collection. |
| Packaging & Presentation | Shipped safely in a premium gemstone specimen box designed for viewing, presentation, and long-term protection. |
| Shipping | Fully trackable, insured express courier worldwide. |
| Custom Jewelry Service | Bespoke design services available to collaborate with their team and turn the gemstone into custom fine jewelry. |
1 in stock

































