Nederlands
A fantastic grayish-blue Paraiba tourmaline of considerable size. This gemstone is certified by GRS, and the certificate states “Cuprian”-Liddicoatite-Elbaite tourmaline, with a reference to its copper-containing character, as found in Paraiba tourmaline. Is this a Paraiba tourmaline, given this complex identification?
The tourmaline has been heated to enhance the color, a common treatment method for Paraiba tourmaline.
Some online research leads us to the GIA website with more information about “Cuprian”-Liddicoatite-Elbaite tourmaline:
https://www.gia.edu/gia-news-research/cuprian-liddicoatite-tourmaline?rendermode=preview
Origin: Mozambique
Treatments: heated
Certificate: GRS Gemresearch Swisslab
