Calcite has been shown to naturally be a 'birefringent' material as it=20
naturally splits light into opposite polarisations therefore providing a=20
cloaking effect.

This is apparently much cheaper than making artificial materials to do the=
=20
same job.

http://www.bbc.co.uk/news/science-environment-12338447

Be rich and start investing in calcite now!

Colin
--
cdb,   3/07/2009
=20
--




colin@btech-online.co.uk

--=20
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