GOETHITE AND HEMATITE. ...

Description

GOETHITE AND HEMATITE
Luis Lopez Mining District, Chupadera Mountains, Socorro Co., New Mexico
This hydrothermally-formed goethite and hematite-glazed specimen dates to approximately 6.2 million years ago. The hematite covers the outer surface of the hydrothermal flow because it is formed out of heated goethite. The large bulbous mammillary formation at the center developed from three stalactitic fingers at the base of the specimen and measures 4 ½ inches across, with other reniform growths elsewhere on the surface measuring from 3 to 4 inches across. Considering the age of the specimen and its having been subjected to numerous earthquakes, it has survived very well; excavated in April 2007. There is minimal damage in spots around the outside edges from its being pried away from the surrounding hydrothermal flow in the original rhyolite cavity, otherwise in fine condition, 11 x 10 x 5 inches and weighing 26 lbs.

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