Half Cut Utah Dugway Geode With Crystals 1 Lb 10.1 Oz 5X4 2in Thick Light Blue

This is a cut half of a Dugway geode, a type of mineral formation found in Utah. The outer layer is made of rhyolite rock, while the interior features layers of chalcedony and agate. The center is lined with sparkling quartz crystals, often described as druzy. These geodes were formed from gas pockets in volcanic lava flows approximately 6 to 8 million years ago. They are known for their distinctive blue-gray color and unique, irregular internal structures.