Tourmaline 11.13 ct | 16 x 12 mm Oval Cabochon | Leaf Green | Rubaya, Congo (DRC)

SKU: TOS271 Category: Tag: Est. Retail Value: USD $1000

Natural Leaf Green Tourmaline (11.13 ct) from Rubaya, Congo (DRC), cut as an elegant 16 x 12 mm oval cabochon with fresh color and smooth luminous character. A distinctive gemstone for a statement ring, pendant, or a fine collection of exceptional cabochon tourmalines.

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Description

This 11.13 ct Tourmaline from Rubaya, Congo (DRC) combines a fresh leaf green color with an elegant 16 x 12 mm oval cabochon cut. Its generous size, graceful proportions, and softly polished surface give the stone a refined and natural presence, making it especially appealing for bespoke jewelry as well as for collectors who appreciate fine cabochon tourmalines.

Leaf green tourmaline is admired for its lively, natural, and highly wearable appearance. The color feels fresh and vivid while remaining balanced and elegant, offering a green tone that works beautifully in both modern and classic jewelry. In cabochon form, this color often appears especially smooth and even, while the domed polished surface creates a gentle glow rather than the sharper reflections of a faceted gemstone.

The oval cabochon cut gives the stone a timeless and versatile outline. Its softly elongated shape is particularly well suited for statement rings, elegant pendants, and other custom jewelry designs where color and graceful proportions should remain the main focus. The cabochon finish also gives the gemstone a softer and more organic character, making it especially attractive for refined and design-oriented settings.

At 11.13 ct, this tourmaline offers substantial visual presence and clear collector appeal while remaining highly suitable for important jewelry creations. Originating from Rubaya in Congo (DRC), it combines attractive provenance with fresh color, elegant cutting, and strong overall character.

A beautiful oval cabochon tourmaline from Rubaya with fresh leaf green color, smooth luster, and excellent potential for statement jewelry or a refined gemstone collection.

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 Carat11.13 ct / 1 pcs
Region / MineRubaya
Country of OriginCongo
Saturation / ToneMedium
ShadeLeaf
ColorGreen
TransperencyTransparent
Stone TypeType I
ClarityMI
Dimensions 1 (L/W/H)16.00 x 12.00 x 17.30 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