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Smoky Quartz on Microcline, Teller Co., CO

A perfectly terminated, water-clear, smoky quartz crystal set within a beautifully structured, self-standing base of Microcline. The Microcline is nearly snow-white, which makes for fantastic contrast. 9 x 7 x 7 cm. REF: PAL-24120502
December 7, 2024 at 2:57 PM
China recently banned exports to the United States of critical minerals including antimony that have widespread military applications. One of the most important antimony minerals is Stibnite, an example of which is shown below from the Raura mining district, Cajatambo Province, Lima, Peru.
December 5, 2024 at 7:25 PM
Aurichalcite, Ojuala Mine, Mapimi, Mexico
Here is a wonderful classic aurichalcite specimen from the Ojuela Mine in Mexico. The piece is loaded with bright greenish-blue, acicular crystals in radial "bursts" on Goethite matrix. 35 x 25 x 15 mm.
November 24, 2024 at 6:37 PM