THE FUMAROLE-SULFATE ORIGIN OPALITES AS A MINE-DEPOSITE OF NEW TYPE AND A HIGH TECHNOLOGICAL BASE FOR SILICATE PRODUCTION. Proc. YSU C: Geol. Geogr. Sci. [Internet]. 2025 Nov. 10 [cited 2026 Jan. 22];35(3 (196):143-8. Available from: https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol35_no3_2001_pp143-148