Cerussite on Pyrolusite (?) Campbell Shaft, Bisbee, Warren...
Cerussite on Pyrolusite (?) Campbell Shaft, Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA "A few small pseudo hexagonal light tan cerussite crystals growing on botryoidal black pyrolusite? I bought this specimen from John Sinkankas. It is pictured in his book Mineralogy for Amateurs." - Rock H. Currier Cerussite was only encountered in crystals in a few places in the Bisbee mines, chiefly in the 155 Stope, off of the Campbell Shaft, on the 1800' level. All known specimens show the same 'pseudo-hexagonal' form and all tend to be found on a black, botryoidal matrix of undetermined composition, probably a mixed Iron Manganese Oxide mineral. Pyrolusite is a likely candidate but Manganese oxides are notorious for changing structure and character in the X-ray beam used to identify them, and therefore Pyrolusite is only a 'best guess.' It doesn't hurt that this specimen was owned, and pictured, by noted collector and author: John Sinkankas. Overall Measurements: 2.2 x 1.4 x 1.2 inches (5.5 x 3.5 x 3.0 cm) Offered at no reserve Provenance: Ex. John Sinkankas Collection [RHC #851, acquired 1967] Publication: Sinkankas, John. Mineralogy for Amateurs. New York: Van Nostrand Reinhold, 1964. Chapter 9, p. 376, Fig. 188. [Scale: 1 inch, with mark at 1 cm]
HID09710052018
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Cerussite on Pyrolusite (?) Campbell Shaft, Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA "A few small pseudo hexagonal light tan cerussite crystals growing on botryoidal black pyrolusite? I bought this specimen from John Sinkankas. It is pictured in his book Mineralogy for Amateurs." - Rock H. Currier Cerussite was only encountered in crystals in a few places in the Bisbee mines, chiefly in the 155 Stope, off of the Campbell Shaft, on the 1800' level. All known specimens show the same 'pseudo-hexagonal' form and all tend to be found on a black, botryoidal matrix of undetermined composition, probably a mixed Iron Manganese Oxide mineral. Pyrolusite is a likely candidate but Manganese oxides are notorious for changing structure and character in the X-ray beam used to identify them, and therefore Pyrolusite is only a 'best guess.' It doesn't hurt that this specimen was owned, and pictured, by noted collector and author: John Sinkankas. Overall Measurements: 2.2 x 1.4 x 1.2 inches (5.5 x 3.5 x 3.0 cm) Offered at no reserve Provenance: Ex. John Sinkankas Collection [RHC #851, acquired 1967] Publication: Sinkankas, John. Mineralogy for Amateurs. New York: Van Nostrand Reinhold, 1964. Chapter 9, p. 376, Fig. 188. [Scale: 1 inch, with mark at 1 cm]
HID09710052018
© 2019 Heritage Auctions | All Rights Reserved
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