Australian Thunderegg 18-22mm oval beads (ETB00044) Lapis Millions of years ago the

Millions of years ago the forests covering Northern Arizona were buried under a sea of mud

Lodalite Quartz is the name given to Quartz included with indeterminate minerals

Both carnelian and sard are varieties of the silica mineral chalcedony colored by impurities of iron oxide

commands a large premium over other rubies of similar quality

Australian Thunderegg 18-22mm oval beads (ETB00044) Lapis Millions of years ago theThundereggs are rough spheres, most about the size of a baseballthough they can range from less than an inch to over a meter across. They usually contain centres of chalcedony in the form of agate, jasper or opal,[1] either uniquely or in combination. Also frequently encountered are quartz and selenite crystals, as well as various other mineral growths and inclusions. Thundereggs usually look like ordinary rocks on the outside, but slicing them in