The phase jin 金, Metal, represents a reaction of the yin principle to the previous predominance of yang polarity during the cosmic summer.

The unique principle ‘contact and reverse’ of the extremes is a fundamental concept in traditional Chinese philosophy, setting it apart from most Western philosophical schools.

In this context, the jin 金 is vigorous, a possible reason why the Chinese chose to name that phase the Chinese character/word jin 金, which, among other meanings, can be translated as ‘metal’.

The yang principle (attuned to spring and summer) is centrifugal, while the yin principle begins to grow in autumn and is centripetal. This represents a cosmic contraction, which defines many of the characteristics of Metal.

When it manifests as Yang Metal (geng 庚), the element is symbolized by a SWORD or an AX, representing its determination, resilience, and often, inflexibility.

When manifested through Yin Metal (xin辛), a JEWEL symbolizes it and represents brightness, attractiveness, intelligence, and resilience.

The two manifestations and respective heavenly stems of Metal become more evident when they correspond to the persons’ Day Master.