Mineral chemistry and geochronology of the Rajasthan
01/05/2020#0183;#32;The emerald deposits in Rajasthan, northwest India, are situated in a narrow NESW belt in the Aravalli Mountains. The studied deposits were formed by the metasomatic reaction between muscovite (#177; garnet #177; tourmaline) pegmatites and lenticular bodies of altered ultramafic rocks that are hosted by the Delhi Group gneisses.