The even distribution and small size of the opal-filled vesicles makes the rock attractive when cut or carved and polished. Veinlets and irregular masses of play-of-color opal showing various bodycolors (red, white, and colorless to pale blue) have also been deposited along joints and fractures within the basalt flow. This opal deposit, which may have been worked in pre-Columbian times, has been explored only by a number of small test pits in recent years, and significant potential remains for its future development. I work directly with local inhabitants of Zimapán and personally import these minerals. I select the best quality pieces.This item is in the category "Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Crystals". The seller is "theczarofgems" and is located in this country: US.
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