dngul rdo
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དངུལ་རྡོ
[[dngul rdo med. mineral [astringent, cooling, good for mending broken bones and drying chu ser] [IW]
hematite ore of iron, kind of stone on which silver is tested [JV]
[[dngul rdo med. mineral * hematite iron ore on which silver is tested [IW]
(med) Acanthite, Silver sulphide AgS (Yeshi 2018). Acanthite is the low-temperature modification of silver sulphide (as Argentite above 177°C). The tarnish on sterling silver is chemically the same as acanthite. Widespread in silver deposits (mindat.org).
(med) Hematite, Silver ore, Pyrargite Ag3SbS3 (Drungtso 1999). Hematite see mdung rtse smug po. Pyrargite is deep red or red-grey mineral (mindat.org) Johannes Schmidt (talk) 18:41, 25 November 2021 (UTC)