<p> Electronic Supplementary Material 7</p><p>Article title: Stable isotope and mineralogical investigation of the genesis of amethyst geodes in the Los Catalanes gemological district, Uruguay, southernmost Paraná volcanic province</p><p>Journal name: Mineralium Deposita</p><p>Authors´ names: Duarte, L.C., Hartmann, L.A., Ronchi, L.H., Berner, Z., Theye, T., Massonne, H.-J.</p><p>Affiliation of the corresponding author (LAH): Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500; 91501-970 Porto Alegre, Rio Grande do Sul, Brazil [email protected]</p><p>Table 7 – Isotopic compositions and concentrations of δ34S in the host rock; conc. = concentration.</p><p>STD Conc.</p><p>δ34S</p><p>Sample (‰ CDT) (ppm)</p><p>Colada Catalán</p><p>CT1 -12.1 0.18 917</p><p>PA33 -0.4 0.05 207</p><p>PA34 -7.6 0.29 180</p><p>PA35 -11.2 0.13 167</p><p>Colada Cordillera</p><p>PA21 -15.0 0.07 n.d.</p><p>PA23 -3.9 0.12 67</p><p>PA25 -5.6 0.03 215</p><p>PA28 -0.3 0.08 117</p>