I'd appreciate seeing pictures with "metallic shine" or chemical analysis to correlate it. My understanding is metals are complexed and need to be reduced to metal by heat treatment/electro-plating to remove oxygen, hydrogen, & carbon.
Most plants evolve utilizing hyperaccumulation to adapt to getting required nutrients and prevent herbivores, eventually like all things, too much of something will become toxic or unmanagable. I don't know if shine is byproduct, but I think shininess affects light for photosynthesis.
Most plants evolve utilizing hyperaccumulation to adapt to getting required nutrients and prevent herbivores, eventually like all things, too much of something will become toxic or unmanagable. I don't know if shine is byproduct, but I think shininess affects light for photosynthesis.