Condor Agate 3d8eb110aa4e2dd471941ad21491bcde inside an underground limestone mine

inside an underground limestone mine sometime between 1770 and 1774

and the United States

Onyx has been mined and used for jewelry

ranging from small sub-gram nugget to the larger pieces weighing a few ounces in size

when it needed to either defend itself from large carnivorous predators

Condor Agate 3d8eb110aa4e2dd471941ad21491bcde inside an underground limestone mineAgate is a form of Chalcedony pronounced Kay sed ony, made up of 90% quartz and 10% morganite. It is composed of microscopically fine fibrous crystals and it normally shows color banding, stripes, whirls, bull's eye and other random patterns due to impurities in the quartz. Igneous rock is formed by lava and volcanic activity. This activity can form pockets bubbles in the rock, similarly to Swiss cheese. When these pockets are formed in an area close