Monumental 6.40ct Green Paraiba Tourmaline | Museum-Grade Collector’s Piece Presenting a true titan of the gemstone world: a 6.40-carat Paraiba Tourmaline. In a market where stones over 2 carats are considered rare, a 6.40ct specimen is an extraordinary find. This copper-bearing (cuprian) tourmaline possesses the legendary “neon” saturation that defines the species, exhibiting a deep, vivid Green that seems to glow with its own internal power. With massive dimensions of $13 \times 10 \times 6.9 \text{ mm}$, this oval mixed-cut gem offers a world-class “face-up” presence that is simply unmatched. Gemstone Specifications Species: Paraiba Tourmaline (Cuprian Elbaite) Weight: 6.40 Carats Shape: Oval Dimensions: $13 \times 10 \times 6.9 \text{ mm}$ Clarity: Moderate (Natural internal “gardens” typical of large cuprian specimens) Color: Deep Neon Green Cut: Mixed Why This Gemstone is a Landmark Piece In the world of rare gems, size creates its own category of value. At nearly 6.5 carats, this Paraiba moves beyond “jewelry grade” into “Museum Grade.” While the clarity is moderate, these natural inclusions are the “fingerprints” of its copper-rich origin and are fully expected in a stone of this significant volume. The vivid Green hue is remarkably consistent across its allows the light to travel through the copper-infused crystal, creating that famous “neon” flash that Paraiba is known for, even in low-light environments. Investment Note: Large Paraiba Tourmalines (5ct ) have seen unprecedented price growth heading into 2026. This stone represents a rare opportunity for a high-end collector or a luxury house looking to create a “Masterpiece” necklace or cocktail ring.
