Nephrite jade in the Ronda peridotites

摘要

We report the presence of nephrite jade, a semiprecious gemstone, in the Ronda peridotites (BeticCordilleras, southern Spain). These rocks are formed by submicroscopic to fine-grained aggregates oftremolite with felted interlocking texture. They occur as pods and discontinuous veins and developed bymetasomatism in the reaction zones between granite dykes and partially serpentinized country rocks