Black Tourmaline from Brazil (8.2 kg), black base

This block of black tourmaline, embedded in a white feldspar matrix, offers a striking and timeless contrast between the deep black of the tourmaline and the pure whiteness of the feldspar.
Black tourmaline, also known as schorl, is a complex silicate with piezoelectric and pyroelectric properties, used in certain industries. This specimen comes from the Minas Gerais mines, a region in Brazil renowned for the quality of its stones. Beyond its decorative beauty, this tourmaline appeals to collectors who appreciate the richness of its geological formation.
A nod to certain popular beliefs suggests that black tourmaline protects against negative energies, a detail that might intrigue curious minds.