Mina Marbella. Grafito Benahavis
Veins and irregular fillings of pure graphite nodules, called "beans" as miners designation occurring with residual Fe-Ni-Cu sulphides, within Spinel Lherzolites , area of intense fracturing and late serpentinization.
Origin: Metamorphic in conjunction to serpentinites and hydrothermal mantle process (incorporate CO2).
