RARE16G-34
Whitlockite with Kulanite
$500.00
Miniature, 3.5 x 1.8 x 1.3 cm
Big Fish River, Dawson Mining District, Yukon, Canada

A good miniature with several colorless to white, translucent to transparent, well-formed, tabular crystals of bobdownsite to 1.5cm with excellent pearlescent luster. Some crystals are complete and some are not. A few kulanite crystals are on the piece for added interest. 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. Bobdownsite is a basic calcium magnesium phosphate.

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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