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Opals

THIS Red Dirt May Mimic Martian Soil

Space.com | Charles Q. Choi | Posted 07.14.2013 | Science

The red dirt in central Australia might be a close mimic for the red surface of Mars, suggests research that sheds light on how opals formed in the la...

PHOTOS: Black Opals, Painite, Lithium and 6 More Of The Most Valuable Minerals In The World

Huffington Post | Barbara Fenig | Posted 05.25.2011 | Green

From rubies to painite, coltan to diamonds, nature produces incredible minerals. Whether they are made into dazzling baubles or used in rechargeable b...