[meteorite-list] penny just dropped...

[Dave Harris]

Hi
I am sure I saw some reference on the list about these Nantan thinn sections 
that appear on Fleabay.
Having just got a polarizing scope I just realised that they can either be 
ruut t/s or completely opaque as Fe and sulphides are opaque to the standard 
30 micron thickness, and would be a bit dull anyway - expecially looking at 
rust!
How funny - shows I learnt SOMETHING already about mineral optics

Cordially yours

dave
IMCA #0092
Sec.BIMS.
www.bimsociety.org