In the Guatemala jadeitite area, there are several rock types such as jadeitites, eclogites and albitites etc., among which omphacitite has not been reported in detail before. Jadeitite and omphacitite studied in this paper are from Guatemala jadeitite area, which is located in the fault zone between North America and Caribbean plates. The petrographic features indicate that at least three stages of replacements existed, and the omphacitite was possibly a production of replacement between jadeitic material and pyroxenite during formation of the jadeitite, and further indicate extensive infiltration of jadeitic fluid and diverse features of replacement within the subduction zone.