![PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil](https://www.researchgate.net/profile/Hartmut-Beurlen/publication/233416371/figure/tbl1/AS:668844888715267@1536476456111/COMPARISON-OF-THE-MAIN-DESCRIPTIVE-PARAMETERS-OF-THE-PT-BEARING-PEGMATITES-WITH_Q320.jpg)
PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil
Merate per lo sport: associazioni riunite in piazza. Festa e premiazione atlete dell'anno - MerateOnline
![PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil](https://www.researchgate.net/profile/Hartmut-Beurlen/publication/233416371/figure/fig5/AS:668844876128264@1536476453630/Comb-textured-dravite-Drv-black-crystals-at-the-transition-of-the-border-zone-to-the_Q320.jpg)
PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil
![PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil PDF) Geochemical and geological controls on the genesis of gem-quality "Paraíba Tourmaline" in granitic pegmatites from northeastern Brazil](https://www.researchgate.net/profile/Hartmut-Beurlen/publication/233416371/figure/fig4/AS:668844876128261@1536476453559/Comb-textured-dravite-black-crystals-along-the-contact-of-the-Quintos-pegmatite-with_Q320.jpg)