Retrieving "Contact Metasomatism" from the archives

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1. Lapis Lazuli

   Linked via "contact metasomatism"

   Geological Occurrence and Formation
   Lapis lazuli is a metamorphic rock resulting from the contact metasomatism of limestone or dolomite subjected to high thermal and pressure regimes near intrusions of igneous rock, typically granite or syenite. The primary source of geological material has historically been the [Sar-i Sang mines](/entrie…