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Pastimes : Evolution - Moderated

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From: 2MAR$	5/12/2014 9:01:01 PM
	of 150

Opalized Fossils If love fossils, you'll love opal. And my tiny brain cannot handle the awesomeness of the two together. Opal is a silica crystal lattice with water molecules slowly squeezed in over eons into the lattice gaps. Opalization can ha...ppen to just about any fossil, but the conditions need to be just right. I think the most interesting are the opal dinosaur bones depicted in the bottom left image; the far left is most likely dinosaur skin! Above that are opalized pinecones. On the bottom right is an ammonite preserved in a way similar to opalization but distinct called ammolite. You know how a bubble's surface appears iridescent? That's because the light is bouncing between the top and bottom surface of the bubble and defracting the different wavelengths of light at different rates. The same process is at play here. You are looking at prisms that nature has made over millions of years and it's beautiful! Share with others! Images: http://www.opalauctions.com/multimedia.php http://www.flickriver.com/photos/tags/ammolite/interesting/ http://www.lostseaopals.com.au/fossils/ http://www.australianopalcentre.com/fossils.php http://au.blouinartinfo.com/news/story/886727/chinas-first-major-gem-show-to-feature-the-australian-opal http://www.opalauctions.com/auctions/opalized-fossil/item-36003 See More

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