In a message dated 7/17/2006 7:54:22 PM Mountain Standard Time, geyser1 at netzero.net writes: Some of the more well known minerals of the garnet group include almandine, pyrope, grossular, andradite, and spessartine. Of these, andradite commonly occurs in darker shades of brown and black. The others are commonly used in the gem trade and tend to be more colorful (reds, oranges, pinks). 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. Scott Bryan -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20060717/ac487d41/attachment.html>