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agatized vs. opalized petrified wood

I've been researching the differences between agatized and opalized wood, and would like some help on this topic. I've been to a bunch of websites, seen the pictures, and now am wondering about a couple of things: first, is opalized petrified wood (without fire) less desirable than agatized petrified wood and is that because opalized wood doesn't take as good of a polish?

Secondly, should I test my petrified wood to determine if parts of it are opal or agate (hardness/scratch tests) and is that the best way to go about doing it. Any other information about the differences would be appreciated. Thank you!

Nancy

From Nancy - December 21, 2001 at 20:11:00
Email: nancyjwagner[ ]sprintmail.com

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