Cryptocrystalline Quartz

Introduction At first glance, the Ghost Glass Frog (Sachatamia ilex) and Blue Spot Jasper seem to have nothing in common. One is a living amphibian hiding in the rainforest canopies of Central America; the other is a polished gemstone resting in a jewelry case. Nevertheless, naturalists, gemstone collectors, and jewelry designers consistently compare the two. The comparison of Ghost Glass […]