6-1/4" Brazilian Agate Bookends ed10ce8492811be02f7a425d8730a8ae inside an underground limestone mine

inside an underground limestone mine sometime between 1770 and 1774

Lazurite is a deep blue to greenish blue rock which forms in limestone and metamorphs by heat

with brains as large (and in some cases larger) than modern man

the main termination of the core crystals remains free of the "cactus" formation

articulated skeletons

6-1/4" Brazilian Agate Bookends ed10ce8492811be02f7a425d8730a8ae inside an underground limestone mineBrazilian Agates are found in the southern states in basalt formations from 4 to 40 feet deep and at elevations of about 2500 to 3500 feet above sea level. Agate is a variety of silica composed of alternating layers of various colored chert or quartz. Agates were named after the Acate River in Sicily where the stones were originally found. The most accepted theory as to how these Agates formed is that as lava cooled, gas and steam accumulated to form