[meteorite-list] Color of OC's by Staining or by Trace Elements

From: Thunder Stone <stanleygregr_at_meteoritecentral.com>
Date: Wed, 30 Mar 2011 09:11:33 -0700
Message-ID: <SNT117-W14C98AB2A1A5FA1143C6DD2BC0_at_phx.gbl>

Hi List:
I hope everyone is well.
I have a question regarding the 'color' of OC's through staining by some mineral influx or by oxidation. ?It appears most fresh OC's start out as a light?beige?or tan color; then through time the metal rusts and they often turn yellowish, orange, or brownish - this make sense. ?My questions is this:
What other colors can they become, blue or green? ?What element(s) result in different colors? ?What different?weathering?processes are involved?
The reason I ask is because I have a weathered meteorite that is dark green in color; it looks like jade and I have not seen any like this one before.
I have also and seen OC's with a 'black' color, what causes that?
Thanks,
Greg S.
Received on Wed 30 Mar 2011 12:11:33 PM PDT