Hubnerite with Monazite-(Ce)

Siglo XX mine, Llallagua, Bustillo Province, Potosi Department, Bolivia
Small Cabinet, 7.4 x 5.0 x 4.2 cm
Start Time: 01/28/2010 6:45:00 pm (CST)
End Time: 02/04/2010 6:45:00 pm (CST)
Auction Closed

Item Description

This is a good matrix specimen of Hubnerite from one of the most famous classic Bolivian localities. There are a few sharp, bladed, black (a very slight red color will appear with strong lighting) crystals of Hubnerite which are associated with dozens of sharp, lustrous, translucent, "butterfly"-twinned crystals of pinkish-orange Monazite-(Ce) with gemmy Quartz crystals on matrix. The Monazite crystals actually show a color change from a pinkish-orange hue in sunlight to a whitish-yellow color in incandescent light. These specimens are not common from Siglo XX, and this piece is one of the better quality display specimens of the material that I have handled. The largest Hubnerite crystal measures 2.2 cm, and the largest Monazite twin measures 3 mm.

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