The metal singing bowls at the centre of most sound baths are frequently marketed as ancient Tibetan artefacts, and that claim does not hold up against the objects themselves. Metallurgical and historical study of surviving bowls, along with the accounts of Himalayan scholars, indicates that so-called Tibetan singing bowls used for sound and healing work are mostly ordinary cast or hammered metal vessels, many originating in Nepal, India or elsewhere in the region, that were used historically for cooking and eating rather than for sound meditation, and that the practice of playing them by striking or rimming them to produce a sustained tone for wellness purposes is a development of the later twentieth century rather than a documented ancient ritual use.
Crystal singing bowls are a distinct and more recent invention again, manufactured from quartz and popularised from the 1980s onward, with no claimed ancient lineage attached to them at all, which makes them a more honest marker of the practice's actual age than the Tibetan branding attached to the metal bowls. The sound bath as a bundled experience, a practitioner playing several such instruments in sequence for a reclining audience, took shape within the Western wellness and yoga-studio circuit from roughly the 1990s onward, growing alongside the broader popularity of sound healing more generally, and its rapid spread through spas, festivals and corporate wellness programmes has occurred with the ancient-artefact framing intact in most commercial marketing even as specialists in Himalayan material culture have been public and consistent in correcting it.