“…According to the XRD results shown in Figure 6, the following minerals are presented in the zeolitic tuff sample: clinoptilolite (as the main zeolite mineral), smectite, mica group minerals, quartz, feldspar, analcime, and amphibole. The results of mineralogical characterization are in accordance with literature data, i.e., the presence of clinoptilolite as the main zeolite mineral in zeolitic tuff from the quarry "Igroš", as well as the presence of smectite, mica group minerals, quartz, feldspar, and analcime, is also confirmed by Kašić et al [64], while the presence of amphibole in subordinate quantities is determined by Cocić et al [65]. Today, more than 50 types of natural zeolite minerals are known [52], and clinoptilolite is the one that is the most used as SCM [22,52,66].…”