Melanite is a variety of andradite. I agree that making up a name for this new geyser(s) should be delayed for a while for the reasons stated below. -- Will   ***********Well, then there is the iron-iron garnet, melanite, which is truly black... But as for that spring at Biscuit, probably we need to wait on a name, or simply come up with something "generic" as 1) the spring might not persist; and 2) the "black" part likely will not stay black.  