" The cave was cool and silent- thoroughly carpeted- with the most luxuriant mantle of mosses Alma Whittaker had ever seen.
The cave was not merely mossy; it throbbed with moss. It was not merely green; it was frantically green. It was so bright in its verdure that the color nearly spoke, as though- smashing through the world of sight- it wanted to migrate into the world of sound. The moss was a thick, living pelt, transforming every rock surface into a mythical, sleeping beast. Improbably, the deepest corners of the cave glittered the brightest; they were absolutely studded, Alma realized with a gasp, with the jewellike filigree of 'Schistotega pennata.'
Goblin's gold, dragon's gold, elfin gold- 'Schistotega pennata' was that rarest of cave mosses, that false gem that gleams like a cat's eye from within the permanent twilight of geologic shade, that unearthly sparkling plant that needs but the briefest sliver of light each day to sparkle like glory forever, that brilliant trickster whose shining facets have fooled so many travelers over the centuries into believing that they have stumbled upon hidden treasure. But to Alma, this 'was' treasure, more stunning than actual riches, for it bedecked the entire cave in the uncanny, glistering, emerald light that she had only ever before seen in miniature, in glimpses of moss seen through a microscope... yet now she was standing fully within it. "

― Elizabeth Gilbert , The Signature of All Things