I’m clutching at straws here but… Any mild mechanical trauma (such as drawing the ring across skin) causes what is known as “Harris’s Triple Response”, or ‘flush, flare, weal’. Redness, heat and mild swelling, basically. In a ‘normal’ person, the response is so mild and over so quickly (dependant on the level of the initial trauma), that you barely notice it.
However it sounds as though in these women (are you sure they were anemic and not just menstruating), the response was somehow altered. People who suffer from sickle cell anemia have sluggish blood flow, due to the odd shape of their RBCs. If these women had sickle cell then since the flow of blood (which is what causes the flush and the flare and facilitates the weal) is slowed, then the triple response would be slowed down also, with noticeable delay in resolution of symptoms… [/quote]
I doubt they had sickle cell and I have no idea if they were menstruating LOL.
I’ll describe it better. We rubbed the ring about as hard as you would scratch an itch, i.e. not that hard. The mark it left looked like it was left by a permanent marker, it was very dark purplish, almost black. The mark was not, to the best of my knowledge, left by something that rubbed off from the gold. Gold is relatively inert and it doesn’t do that.
Also, I should reiterate that the guy who showed us this had no idea if it was really a result of anemia. As far as we know he is completely clueless. He did mention anemia but he isn’t exactly in a position to speak with any authority.