nag tshur
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ནག་ཚུར
salt med [IW]
black alum, mineral used for cleaning gold, black pigment, mineral for dying black [JV]
(med) Fibroferrite, Ferric sulfate (Yeshi 2018), Black fibroferrite, Black vitriol (Drungtso 1999).
Synonyms : nag mtshur, mtshur nag ('Phrin Las)
nag tshur ser tshur rul gcod skran la brko / zhes pa 'di gnyis sa dang brag las phyur ba ste / kha dog ma nge kyang tshur nag shas che sa dang brag las kyang 'byung ba dang / de yang sa brag sngo ba dang nag pa las 'byung ba shas che / ser tshur brag las 'byung ba dang / brag dkar ba skya ba las 'byung ba shas che / brag la yang rang mdog gi brag dreg 'byung / phyi dbyibs tshur nag kha dog dkar la ser kha chags / ser tshur dkar la skya / ro 'dra ba las nag po ngad che / nges pa ni / snya lo / bra bo / y ru ra / se 'bru'i gang bu rnams gang rigs dang mnyam du chur sbyar bas khu ba nag ser rang mdog ston / 'dres pas ser ljang yong ba yang yod / khu ba de bzhin la ba dang bal la tshos byas kyang 'ju ba'o // (Shel gong shel phreng, pdf p 384.2)
Illustrations : Phrin Las (26_010) nag mtshur
Natural salt medicine. nag tshur and ser tshur are treated in one single notice. Black fibroferrite or black vitriol (Drungtso 1999) may be a mixture : "Many websites state "black vitriol is a mixture of iron sulfate and iron sulfite", but none gives a reference of any sort (wikipedia). Vitriol itself is an ancient and now obsolete name for several hydrated metal sulfates, mostly iron or copper (wikipedia)
Johannes Schmidt (talk) 16:18, 25 February 2024 (EST)