RARE16G-30
Bobdownsite
$250.00
Thumbnail, 2.8 x 1.9 x 1.0 cm
Big Fish River, Dawson Mining District, Yukon, Canada

Thumbnail with several colorless to white, translucent to transparent, tabular, complete to partial crystals of bobdownsite to 1.0cm with excellent pearlescent to vitreous luster. As a bonus, there are several dark, teal blue clusters of kulanite up to 1.5mm on the piece. This is part of a lot of bobdownsite specimens found by Rod Tyson at a "private location" in 2005, subsequently characterized and approved in 2008 as a new species after first being sold as whitlockite.

Per mindat.org: Described as a new mineral in 2008, as the F-dominant analogue of whitlockite.
Later, in 2018, it was discredited because it was showed that it does not contain F, which was its distinguishing characteristic as a new mineral.
F-free bobdownsite is equivalent to the mineral whitlockite, although the phase probably lies along the whitlockite-merrillite join (IMA-17E).

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