On Tue, 10 Aug 1999 [log in to unmask] wrote:

>        2. Green shell edge turns red when effected by heat

Hmm, I'm not sure about this.  Do you have really good proof (i.e.,
crossmended sherds from differently fired areas, that are green un-fired,
and red fired)?  From personal experience, any fire hot enough to begin
altering the appearance of ceramic, esp. white bodied refined earthenwares
(note how deftly I avoid the pearl-/white-/creamware debate!) and
especially a fire hot enough to melt iron, is going to obliterate most any
traces of decoration, and will possibly deform the shape of the sherd.  As
I said, unless you have good proof that the vessel was originally green, I
would suspect that you have plain old garden variety (ha ha) red shell
edge.

--Dan