man shel
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མན་ཤེལ
crystal, glass [RY]
crystal, glass, crystal gem [JV]
(sman) Realgar (Yeshi 2018)
Synonyms : ldong ros, dmar po dri ldan, gar mkhan ma, glu che ba, ma ni tsha.
See ldong ros for the tibetan notice. In the Mahāvyutpatti (5955) man shel translates Śilā under the heading 'Gems and precious substances'. The indian name Manaḥśilā denotes Realgar and has three varieties : Śyāma (Śyāmikā), Rakta (Kaṇavīrā) and Khaṇḍikā. (wisdomlib.org)
From Arabic "rahj al-gahr", powder of the mine. Realgar (Arsenic monosulfide AsS) is known as a mineral pigment in Byzantium. Upon exposition to light the red realgar changes into yellowish-brown pararealgar. It also gives the yellow orpiment (ba bla) as alteration product (mindat.org).
Johannes Schmidt (talk) 20:06, 18 November 2021 (UTC)