Mexican “Trancas” geodes are surface mined about 220 miles south of El Paso, Texas in Chihuahua province, Mexico. These particular geodes, while not as colorful as the “coconut” geodes, do contain primarily clear or drusy quartz linings and may also have calcite, fluorite, and quartz scepters as well. One of the most notable features of these geodes is their fluorescent ability due to trace uranium content (not enough to harm life). Under shortwave UV light, approximately 80-85% of these geodes fluoresce bright green. All of the geode pairs on this page have been cracked open with a soil pipe cutter unless otherwise noted, and you will receive both halves as pictured for the price. If you would like the opportunity to open your own Mexican “Trancas” geodes, please visit our Whole Mexican Trancas Geodes page.