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
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