[Rockhounds] Kyawthuite

[Paul]

Meet the world’s rarest mineral. It was found only once
A single gemstone from Myanmar holds the title of Earth's
rarest mineral, kyawthuite. by Tibi Puiu, ZME Science, Nov. 28, 2024 
https://www.zmescience.com/science/geology/world-rarest-mineral/
 
Some papers are:

 Kampf, A.R., Rossman, G.R., Ma, C. and Williams, P.A., 2017. Kyawthuite, Bi3+ Sb5+ O4, a new gem mineral from Mogok, Burma (Myanmar). Mineralogical Magazine, 81(3), pp.477-484.
https://authors.library.caltech.edu/records/9669t-pbb15/files/477.full.pdf

Thu, K., & Zaw, K. (2017).  Ch. 23. Gem deposits of Myanmar. 
In  A. J. Barber,  K. Zaw, & M. J. Crow (Eds.),  Myanmar: Geology, 
Resources and Tectonics,  Memoir, (Vol.  48, pp.  497–529). London: 
Geological Society of London. 
https://www.academia.edu/115375912/Chapter_23_Gem_deposits_of_Myanmar
https://independent.academia.edu/KyawThu29

 Yours,

 Paul H.