http://www.goworldtravel.com/ex/aspx/artic.../xe/article.htm
and
http://adamant.typep.../blue-jade.html
cool quotes:
“It’s an old stone that lies deep below the surface,” he says. “You need to strike it to wake it up, and when you do, it sings.”
“In 1969, we found a jade boulder weighing several tons submerged in the earth not too far from here,” Hernandez explains. “It took 300 villagers to haul it back to town.” The huge monolith now sits in the local schoolyard.

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