lcags rdo
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ལྕགས་རྡོ
shotput, flint stones, iron stone, iron ore [JV]
iron ore [RY]
(med) Iron ore (Drungtso 1999), Limonite (Yeshi 2018)
Synonyms : gru bzhi, brgya rdo, zhang blon bla rdo, sin dhu ra, rgya mtsho'i breg pa, mkha 'gro'i mnyal khrag (Yeshi 2018).
lcags kyi rdo bas tshe 'phel bcud len byed / ces par ka dog nag po dang ser po gnyis / gang yang lci la bzhus na lcags 'byungs ba de yin / rgyu ngar mnyen gnyis pho mo rgod g.yung rim pa'o // (Shel gong shel phreng, pdf p 115.1)
The chief ores of iron consist mainly of the oxides: hematite (mdung rtse smug po), goethite (mdung rtse dkar po) or limonite (sin dhu ra); and the carbonate siderite. Siderite, FeCO3, can be yellowish- to greyish-brown, green, red and black. Fungi like Lichenothelia may oxidize iron to produce siderite, which is then a biomineral. Often found in bedded sedimentary deposits with a biological component, suggesting a biogenical origin. Numerous sites in Tibet. (mindat. org)
Johannes Schmidt (talk) 06:35, 25 February 2024 (EST)