Best chakra sound bowl set, clear alchemy bowls set, crystal tuning fork set. sound bath, the perfect choice for sound therapy courses. Each bowl is tuned to a specific chakra, allowing for a variety of tones and frequencies to be explored. Crystal singing bowls come in different sizes and notes, each with its own unique sound and vibration. Some bowls are clear, while others are infused with additional minerals or metals, adding a visual and energetic element to the instrument.