Tourmaline Companion Pair 10.20 ct | Matching Cut | Mint Green | Rubaya, Congo (DRC)

SKU: TOP034 Category: Tag: Est. Retail Value: USD $3700

Stylish companion pair of Mint Green Tourmalines (10.20 ct) from the Congo, featuring the same lively mint palette and strong pleochroism: bluish-green in the center with yellowish-green edges. Matching in color and cutting style, with intentionally different sizes—perfect for a toi et moi (two-stone) ring, or for a coordinated pendant and matching ring in the same look.

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Description

This elegant companion pair of Mint Green Tourmalines from the Congo is made for modern, design-driven jewelry. With a combined weight of 10.20 carats, the two stones are matched in color and cutting style, yet differ in size—creating a sophisticated, intentional contrast that looks especially striking in contemporary settings.

Distinct pleochroism: natural two-tone mint character

Tourmaline is famous for pleochroism, and this pair shows it beautifully. Each stone displays:

  • a bluish-green core that feels cool and refined

  • yellowish-green edges that add brightness and lively energy

This natural two-tone effect gives the gems depth and movement, changing subtly with angle and light.

Matching look, different size — perfect for modern design

Because the cutting and color character are consistent, the stones feel like a true pair—just with a deliberate size difference. That makes them ideal for:

  • toi et moi rings (two-stone rings), where contrast is part of the style

  • a pendant + matching ring, using one stone in each piece

  • coordinated sets with a modern, asymmetrical concept

Cut to perform

Both stones are cut to maximize brilliance and a clean face-up look, enhancing the fresh mint color and the pleochroic two-tone appearance. The result is a pair that looks lively, bright, and premium in jewelry.

A modern mint-tourmaline duo from the Congo—matched in character, intentionally uneven in size, and perfect for contemporary two-stone designs.

Additional Information

Certification Options

Every gemstone purchased from Gem Fountain includes a free Gem Fountain Gemstone Report, provided as a PDF file, documenting the key characteristics and authenticity of the stone.

For customers who require independent laboratory verification, we offer the option to add third-party gemstone reports. Upon selection, the gemstone will be submitted to the chosen accredited gemological laboratory. Estimated fees and processing times are as follows:

  • BGL – Brief Report: USD 19
    Processing time: approximately 1–2 business days
  • AIG – Brief Report: USD 38
    Processing time: approximately 7–8 business days
  • LOTUS – Soft Cover Report: USD 128
    Processing time: approximately 7–8 business days

All external reports are optional and can be selected as an add-on prior to shipment. Processing times may vary slightly depending on laboratory workload.

Shipping & Payment

All gemstones are shipped directly from Thailand, one of the world’s leading gemstone trading hubs. We deliver to almost all countries worldwide, using reliable and insured shipping partners to ensure safe and secure delivery. Each order is carefully packaged, and tracking details are provided once the shipment has been dispatched. Delivery times may vary depending on destination and local customs procedures. Any applicable duties, taxes, or import fees are the responsibility of the recipient.

We offer flexible payment options to accommodate our international clientele. Most common payment methods are accepted at checkout. Customers who choose to pay via wire transfer (Wise) receive a 5% discount, which can be selected directly during the checkout process.

Specification

Overview
Total Carat10.20 ct / 2 pcs
Country of OriginCongo
Region / MineRubaya
Saturation / ToneRich
ShadeMint
ColorGreen
TransperencyTransparent
Stone TypeType I
ClarityEC
Dimensions 1 (L/W/H)12.60 x 9.00 x 6.90 mm
Dimension 2 (L/W/H)12.00 x 8.30 x 5.80 mm
Untreated

No indication of artificial enhancement.

Read more about common gemstone treatments →
Refractive Index nω = 1.633–1.651 & nε = 1.615–1.630
Birefringence 0.018 – 0.021
Hardness (Mohs) 7.0 - 7.5
Gravity 3.00 - 3.10
Crystal System Trigonal
Chemical Formular Aluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg