#jeremejevite
Jeremejevite
Aluminium borate mineral with variable fluoride and hydroxide ions
Jeremejevite is an aluminium borate mineral with variable fluoride and hydroxide ions. Its chemical formula is Al6B5O15(F,OH)3. It is considered as one of the rarest, thus one of the most expensive stones. For nearly a century, it was considered as one of the rarest gemstones in the world.
Tue 2nd
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