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Meadoway | 10:19 Mon 06th Jun 2011 | Crosswords
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ornamental section of cloth sewn into a garment

I have i?s?e?

That is assuming colemanite is correct for 27 Across Mineral with polarising properties typically black ?o?e?a?i?e

Les
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Avatar Image jwlswann
20d insert 27a Tourmaline
10:26 Mon 06th Jun 2011
Avatar Image Euphemia
insert
10:27 Mon 06th Jun 2011
Avatar Image Meadoway
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Thank you JWLSWANN AND EUPHEMIA
10:31 Mon 06th Jun 2011
Avatar Image broker1
Insert is the answer, the mineral is not colemanite but tourmanite.
Cheers,
Jerry
11:34 Mon 06th Jun 2011
Avatar Image DrFilth
Search ResultsPolarizer - Wikipedia, the free encyclopedia
A polarizing filter cuts down the reflections (top) and made it possible to ... The best known crystal of this type is tourmaline. ... Other linear polarizers exploit the birefringent properties of crystals such as quartz and calcite. ...
en.wikipedia.org/wiki/Polarizer -
11:55 Mon 06th Jun 2011

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