Cristal bowls
More recently, another bowl has emerged: in the 1990s, laboratory crucibles, made of quartz powder raised to more than 3000 degrees according to a French Saint-Gobain patent, were diverted from their primary function to join the spaces of energy practice thanks to their vibrational and acoustic qualities. They are now mainly manufactured in China using an industrial process.
In contrast to Tibetan singing bowls that emit harmonic-rich sounds due to their composition made of different metals, the crystal bowls, because of their exceptional purity, produce almost no harmonic and so offer a fundamental note of great precision and intensity.