Here's former Begum Inaara's tourmalines, I believe they are called Paraíba tourmalines. She wore a necklace and earrings with these gems at the prewedding of the present Spanish royal couple in 2004. According to Hola magazine at the time these jewels wore considered to be top quality and extremely expensive.
It seems the Begum's tourmalines were of the most profund green variety.
--Previous Message-- : : The best I could find to start off with for : October. : : From the auction of jewelllery of the : Duchess of Windsor. : : A two-colour gold enamel, cultured pearl, : tourmaline and quartz necklace, French, c : 1950 : : : : :