NWA 4478 Lodranite: mystery rainbow feature

NWA4478-lodranite-rainbow

Mystery solved: UPDATE (7/28/2012):  After receiving my new microscope, I was able to view the area at much higher magnification.  I very carefully used an X-Acto knife to gently scrape the area and the film causing the rainbow does come off.  There appears to be a thin film of something on the specimen (reminds me [...]

Possible missing link between HED (Howardite, Eucrite, Diogenite) meteorite group and mesosiderites

NWA6953-thin-slice-image-A

John Higgins (IMCA member 9822) recently sent out an email on April 14, 2012 to announce the availability of a new meteorite, NWA 6953 (provisional).  Here is what he had to say: “Northwest Africa 6953 is an interesting new mesosiderite whose unique nature is a result of its composition and the collective effects of long-term [...]