Melanin is a chemical. Melanin can be found in animal fur, fish scales, bird feathers, microorganisms, and cephalopod ink among other places. Most people equate melanin with human skin, hair and eyes.
Like any chemical melanin has a dollar value. There are at last two methods through which melanin can be extracted from the ink of cephalopods. Specifically the ink of sepia officinalis, the common cuttlefish is the source for melanin being sold online. Chemcially, it is the model for all eumelanin or true melanin.
As of January 2, 2020 Melanin is worth $445 a gram. Gold is worth $49.09 a gram. That means melanin is worth over $395 a a gram more than gold. Melanin is worth more than gold, silver, platinum, palladium, rhodium and coltan combined.