Natural Mahenge Blue Spinel, 0.09 Carats, Oval Cut, unheated
$61.00
| 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
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Presenting a 0.09 Carat Natural Cobalt Blue Spinel from the mining region of Mahenge, Tanzania.
As captured in daylight, this specimen displays a bright, crisp blue tone with a lively, electric play of light across its facets.
Completely untouched by human intervention, this gem is 100% unheated and untreated, preserving the exact crystalline beauty created by nature. Expertly fashioned into a classic Oval Cut, its clarity and sharp faceting maximize its brilliance, giving it a beautifully bright face-up appearance.
📝 Gemstone Specifications
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 Features of This Mahenge Cobalt Spinel:
Cobalt-Driven Hue: The trace element cobalt creates a distinct, open blue hue that stands out from standard, darker blue spinels.
Mahenge Origin: Sourced from Mahenge, Tanzania—a gemstone hotspot known for producing crystals with excellent crystal clarity and light dispersion.
100% Unheated Purity: This specimen is entirely untreated, making it a pure, pristine example of natural geological formation.
Ideal for Precision Jewelry: At 0.09 carats, this finely faceted gem is an excellent choice for a delicate accent stone in a multi-gem layout, a custom ring accent, or a fine addition to a mineral capsule collection.
📦 Shipping & Packaging
Secure Presentation: Shipped safely in a premium gemstone specimen box designed for viewing, presentation, and long-term protection.
Insured Shipping: Dispatched via fully trackable, insured express courier to guarantee safe, swift arrival at your doorstep.
💬 Custom Fine Jewelry Design
Looking to feature this Tanzanian treasure in a custom-designed piece? We specialize in crafting high-end, bespoke fine jewelry. Send us a message today to collaborate with our design team and bring your dream jewelry piece to life!
Note: As shown in the macro imagery, our photos are taken under natural lighting conditions to showcase the stone’s true-to-life hue and brilliance. Minor color shifts may occur depending on your digital screen settings or local indoor lighting.
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| 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 |
| Attribute | Description |
|---|---|
| Gemstone | Natural Mahenge Spinel |
| Origin | Mahenge, Tanzania |
| Weight | 8.19 carats |
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| Measurement | 14 mm x 9.6 mm x 6.2 mm |
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| 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 |
| Category | Details |
|---|---|
| Gemstone | Natural Mahenge Spinel |
| Carat Weight | 0.92 ct |
| Color | Vivid Neon Pink-Red |
| Cut / Shape | Rectangle Emerald Cut / Step Cut |
| Dimensions | 6.86 × 4.25 × 3.26 mm |
| Clarity | Eye Clean / VVS (Excellent Transparency) |
| Treatment | None (Completely Unheated & Untreated) |
| Origin | Mahenge 🇹🇿 |
| Special Features | Neon saturation, hall-of-mirrors effect, exceptional brilliance |
| Best For | Solitaire rings, pendants, high-end custom jewelry |
| Suggested Designs | Minimalist solitaire ring, three-stone ring with baguette diamonds, statement pendant |
| Sourcing | Ethically sourced from family-run mining operations |
| Quality Control | Hand-selected and inspected in Bangkok |
| Shipping | Worldwide insured shipping with tracking in a luxury gemstone box |
| 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 |
| 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 |
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| Visual Characteristics | Sweet pink undertones blended with a striking, passionate red body color, exceptional internal fire, high clarity, and a lively face-up look. |
| Gemstone Type | Natural Spinel |
| Weight | 0.21 Carats |
| Shape / Cut | Oval Faceted |
| Color | Vibrant Pinkish-Red / Hot Pinkish Red |
| Treatment | Unheated / Untreated (100% Natural) |
| Dimensions | 3.7 x 2.79 x 2.4 mm |
| Key Highlights | 100% pure & unheated, incredible light return with high refractive index, and superb everyday durability (Mohs hardness of 8). |
| Ideal Uses | Vibrant accent stone for multi-gem pieces or halo designs, centerpiece for a dainty minimalist stacking ring or chain pendant, or for independent jewelry designers. |
| Packaging & Presentation | Securely packaged and shipped in a professional protective gem display box, ready for setting or gifting. |
| Shipping | Fast, fully tracked shipping. |
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| Item | 1.56ct Natural Mahenge Spinel Gemstone |
| Variety | Mahenge Spinel |
| Weight | 1.56 Carats |
| Dimensions | 7.75 x 5.75 x 4.65 mm |
| Cut / Shape | Oval Cut |
| Color | Vivid Neon Pinkish-Red |
| Clarity | Slightly Included High Transparency |
| Hardness | 8 on the Mohs scale |
| Origin | Mahenge, Tanzania |
| Treatment | No Heat / No Treatment (100% Natural) |
| Sourcing & Shipping | Ethically sourced, hand-selected and shipped from Bangkok, Thailand with secure, insured worldwide shipping |
| Specification | Details |
| Variety | Natural Spinel |
| Origin | Mahenge, Tanzania |
| Weight | 2.15 Carats |
| Dimensions | 7.70 x 6.32 x 5.11 mm |
| Shape/Cut | Cushion Cut |
| Color | Soft Pink |
| Clarity | Included (Heavy inclusions) |
| Treatment | None (100% Natural, unheated) |
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| Gem Type | Natural Spinel |
| Origin | Mahenge, Tanzania |
| Weight | 1.2 Carats |
| Dimensions | 7.1 x 5.24 x 3.89 mm |
| Shape/Cut | Oval |
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| Clarity | Slightly Included |
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| Design Ideas | Bespoke Engagement Ring, Modern Solitaire, Art Deco Pendant |
| Authenticity | Ethically sourced, 100% natural, untreated, investment-quality |
Natural Blue Mahenge Spinel – 0.30 Carats (Unheated)
Presenting a 0.30 Carat Natural Blue Spinel directly from the premier mining region of Mahenge, Tanzania.
As beautifully captured in the natural daylight photograph, this gemstone
1 in stock































