Vanadinite pseudomorph after Siderite (RARE locality specimen)

Item Description

PLEASE NOTE: This specimen is labeled (multiple times) as coming from the Silver Cross Mine in the Castle Dome District, but I can't find a listing for this locality in any database. I thread on one of the forums on mindat.org from Jack Crowley provided the only information I could find about this locality. In short, Jack stated, "as best I remember Bill S. {Sanborn} said the Silver Cross (also known as the Vulture) is a vertical shaft a short distance approximately west of the Puzzler shaft". See https://www.mindat.org/mesg-201852.html for the full thread.
With that said, this is the ONLY specimen of its kind that I can remember seeing from Castle Dome, and it's a showy display specimen to boot. Multiple, well-formed rhombic crystals of what were originally Siderite (though labeled as Calcite on one of the labels accompanying the piece) have been pseudomorphed by small, sparkling, tan-brown colored Vanadinite, on matrix. The largest individual rhomb measures about 2.4 cm on edge. The piece is in fine condition, with no major damage on the front/display side, only a bit of peripheral roughness where it was separated from the pocket wall. Truly I can't remember seeing anything else like this from the area, and if you collect pseudomorphs or minerals from Arizona, this is a fine rare locality specimen that you're not likely to find anywhere else on the market.
This specimen was originally in the collection of David Ellis, and later came to Robert Jenkins, a friend of George Loud's who was an exploration geologist who worked for DuPont and Conoco.
Ex George Loud Collection No. 41.7.2.3 AZ.5; 5756. George (born August 16, 1942) is a well-known mineral collector from Washington, DC and South Carolina respectively, and was a patent lawyer by trade for over 50 years. He assembled one of the great mineral collections in the U.S., comprising worldwide specimens, and in later years he sold the worldwide specimens to focus on minerals of the United States, specifically locality suites with an emphasis on amazing representation of species while still maintaining fine quality. The specimens remarkably range from micros to all the way up to large cabinets in size. We recently acquired most of his impressive 9000+ piece collection, and the VAST majority of these pieces will be offered here in the auctions, as we feel that everyone deserves and equal opportunity at acquiring these important, well-documented and fine quality specimens for their collections.
See: https://mineralogicalrecord.com/biographies_labels/george-loud for more information