ser mtshur
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སེར་མཚུར
(med) Fibroferrite, Iron sulfate [Fe3+(SO4)(OH)·5H2O (Yeshi 2018), Golden or Yellow vitriol (Phrin Las 1987, Drungtso 1999). Synonyms : ser tshur, tshur ser,sa mtshur, sho 'na ka (Drungtso 1999, Yeshi 2018). See also nag mtshur.
Fibroferrite is of yellow, yellowish-green to green-grey color. (mindat.org). Vitriol itself is an ancient and now obsolete name for several hydrated metal sulfates, mostly iron or copper (wikipedia) Johannes Schmidt (talk) 15:03, 27 November 2021 (UTC)