12.21 Ct Natural Green Tourmaline | Octagon Step Cut | GFCO Certified Green Tourmaline

Product Description

2250

A remarkable 12.21 carat Natural Green Tourmaline featuring a rich forest-green color and an elegant octagonal step-cut design. Accompanied by a GFCO Gem Lab Certificate, this impressive gemstone displays exceptional transparency, sophisticated cutting, and outstanding presence.

Tourmaline is one of the most versatile and highly prized gemstone families, celebrated for its wide range of colors and exceptional brilliance. Green tourmalines are particularly sought after for their vibrant natural color, durability, and attractive appearance that rivals many of the world's most famous green gemstones.

This gemstone has been fashioned into a refined octagonal step cut, showcasing crisp facet junctions, excellent symmetry, and beautiful internal reflections. The elongated rectangular shape enhances the stone's visual size while maximizing color depth and elegance. The step-cut faceting creates a sophisticated hall-of-mirrors effect that highlights the gemstone's rich green saturation and remarkable clarity.

With a substantial weight of 12.21 carats, this gemstone offers impressive visual impact and is ideally suited for high-end custom jewelry creations, collector portfolios, or investment-grade gemstone collections.

Its deep green color, large size, and professional certification make it a highly desirable gemstone for those seeking a statement piece with timeless appeal.

Gemstone Specifications

Gemstone: Natural Green Tourmaline

Species: Natural Tourmaline

Weight: 12.21 Carats

Shape: Octagon

Cut Style: Step Cut

Crown Cut: Step

Pavilion Cut: Step

Dimensions: 16.95 × 10.13 × 7.38 mm

Color: Green

Refractive Index: 1.620 – 1.640

Specific Gravity: 3.09

Optic Character: Doubly Refractive (DR)

Treatments: No indications reported

Certification: GFCO Gem Lab

Report Number: ADP36644

Code: 42030-45

Report Date: 03 February 2026

Why Choose This Gemstone?

✔ Natural Green Tourmaline

✔ Impressive 12.21 Carat Weight

✔ Elegant Octagonal Step Cut

✔ Rich Forest Green Color

✔ Excellent Transparency

✔ Collector-Grade Size

✔ Certified by GFCO Gem Lab

✔ Ideal for Custom High Jewelry

✔ Strong Investment Appeal

✔ Rare Large Natural Tourmaline