sacredearthgifts: Huge clear quartz cluster my buddy Henry Rogers mined at the Coleman Crystal Mine in Jessieville, Arkansas

sacredearthgifts: Huge clear quartz cluster my buddy Henry Rogers mined at the Coleman Crystal Mine in Jessieville, Arkansas

"GeoPicture of the week: Tree fossil with opal growth rings -- This is an very rare sample: opal can be fairly common in petrified wood, but this is a fire opal, which makes it so much more valuable. …So how did this magnificent opalized tree came to be? Initially, water filled the cracks and empty spaces of the source fossil, and the silica content in the water hardened and turned into opal or chalcedony."

"GeoPicture of the week: Tree fossil with opal growth rings -- This is an very rare sample: opal can be fairly common in petrified wood, but this is a fire opal, which makes it so much more valuable. …So how did this magnificent opalized tree came to be? Initially, water filled the cracks and empty spaces of the source fossil, and the silica content in the water hardened and turned into opal or chalcedony."

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