Tourmaline Set 12.69 ct | Cushion Cut | Mint Green | Rubaya, Congo (DRC)

SKU: TOT002

Perfectly matching Mint Green Tourmaline set (12.69 ct) from the Congo, featuring a matched pair plus a larger center stone. Strong pleochroism creates a vivid two-tone look: bluish-green in the center and lively yellowish-green along the edges. Eye clean with excellent brilliance, precision-finished by our in-house cutter—ideal for a three-stone ring, or earrings with a perfectly matching ring or pendant.

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$2,284.00

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1 in stock

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Description

This exceptional Mint Green Tourmaline set from the Congo is a rare find: a truly coordinated group designed for high-end jewelry projects. With a total weight of 12.69 carats, the set includes a perfectly matching pair plus a larger single stone that works beautifully as a centerpiece. The result is an elegant, ready-to-use combination for designers who want harmony, color consistency, and strong visual impact.

Distinct pleochroism: two-tone mint brilliance

Tourmaline is famous for pleochroism, and this set shows it in a very attractive way. Each stone displays:

  • a bluish-green core (cool, fresh, refined)

  • yellowish-green edges (lively, bright, energetic)

This natural two-tone effect creates depth and movement—making the stones look “alive” as they shift in different angles and lighting.

Perfectly matched for coordinated jewelry

Finding stones that match this well—especially as a pair plus a larger companion stone—is uncommon. This set is ideal for:

  • a three-stone ring (center stone + two side stones)

  • earrings from the matching pair plus a matching ring or pendant with the larger stone

  • coordinated suite concepts for bespoke jewelry

Eye-clean clarity and top cutting

The stones are selected for best clarity (eye clean) and finished with excellent cutting quality by our in-house cutter. The precision of the cut enhances both brilliance and color performance, emphasizing the mint palette and the pleochroic two-tone character.

A rare, design-ready mint tourmaline suite—eye clean, expertly cut, and perfectly matched for elegant coordinated jewelry.

Specification

Overview

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

Processor

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

Display

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

RAM

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

Storage

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

Video Card

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

Connectivity

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

Features

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

Battery

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

General

Stone(s)
Total weight12.69 ct / 3 pcs
Country of OriginCongo
TreatmentUntreated
Stone TypeType I
TransperencyTransparent
ClarityEC
Saturation / ToneRich
ShadeMint
ColorGreen
Shape(s)Cushion
Cutting StyleFaceted
Cut CrownBrilliant Cut
Cut PavilionStep Cut
Dimensions 1 (L/W/H)Pair = 11.00 x 7.50 mm
Dimension 2 (L/W/H)Middle Stone 12.90 x 8.40 x 6.20
Gemstone Seletion
HTS-Code7103.99.0000
Refractive Indexnω = 1.633–1.651 & nε = 1.615–1.630
Birefringence0.018 – 0.021
Hardness (Mohs)7.0 – 7.5
Gravity3.00 – 3.10
Crystal SystemTrigonal
Chemical FormularAluminium borosilicates – solid solution crystals with variable composition, Fe²⁺, Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄, Mn, Na(Mg
Region / MineRubaya

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