[meteorite-list] A small Al Mahbas testimonial (& RainbowOlivine!)

[tracy latimer]

Aloha, Jeff!
Often you will see on quartz crystals with internal fractures that the 
fracture has turned into a kind of prism, and light refracting through the 
split makes the crystal appear to have a rainbow along the cleavage.  Maybe 
the olivine crystals that are rainbowed have the same thing going on.  Not 
having your slice to personally look at, I can only speculate, though.

Happy holidays!
Tracy Latimer

>
>G'day Tracy and List,
>
>I certainly agree. I was lucky enough to get a nice piece from Mike (thanks
>Mike) which I have put onto a page at my site. What is really amazing about
>this piece is that one of the olivine crystals has a rainbow effect/colour.
>Hard to describe so the pics are here:
>
>http://www.meteoritesaustralia.com/features/almahbas.html
>
>If anyone has any opinions about how this would form or occur, I'd 
>certainly
>like to hear them.
>
>Cheers,
>
>Jeff Kuyken