This Rare Mineral Has Been Found in Less Than a Dozen Locations Globally!, This Being The First Type Locality, Meaning the First Deposit Used to Formerly Identify the Mineral Species. Two Crystals of Varying Lustre and Forms of Fluor-Buergerite, a Rare Iron Rich Tourmaline, from Mexquitic de Carmona in San Luis Potosí, Mexico. These Crystals are mounted in a clear box and display varying lustre, colour, and forms of an extraordinarily rare mineral. A very unique member of the Tourmalines!
