Paraiba Tourmaline Necklace Could fetch $2.5M

The largest top-quality paraiba tourmaline ever to come to auction will be in Sotheby’s Nov. 8 Magnificent Jewels and Noble Jewels sale in Geneva, the auction house says.

Known as the Blue Lagoon, the 93.94 ct. stone is the focal point of a diamond lariat-style necklace by Swiss maison Adler Joailliers. It’s expected to achieve anywhere from $1.52 million to $2.54 million.

Paraiba tourmaline has bright neon colors, ranging in color from blue to green, all of which are quite bright. The stone got its name from the area where it was discovered in Brazil in the late 1980s. Paraiba tourmaline is more expensive than other types, as it has copper, Which reflects a blue or green color, while regular tourmaline, which is rich in iron, reflects black to bluish-black to dark brown, while types rich in magnesium reflect colors from brown to yellow.

Adler company, created the necklace specifically for the large paraiba tourmaline, with multiple cuts of diamonds weighing over 70 cts. dripping down the wearer’s décolletage. In a statement, Adler described it as a “classic with a twist” and referred to the longevity of the investment piece.