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Smithsonian National Museum of Natural History

Opal

This opal ''Thunder Egg
Photo by Greg Polley. Click to zoom.
Catalog Number NMNH G11668-00

This opal “thunder egg” is the first of its kind in the National Gem Collection from Mezezo, Ethiopia. The halves both exhibit a translucent orange opal rim with play-of-color and an opaque banded opal center.

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