Our Empyream crystal bowls are made to specific pitches, which is a phenomenal technology for crystal singing bowls. Each bowl is hand polished on the outside so it is not rough, so when you play the bowl you do not get a rough noise from a striker. The bowls tend to have clear consistent tones. Here we have a few selection empyream bowls put together into sets for your enjoyment. Please let us know if you have any questions. Give us a call 802-674-9585 or email us at firstname.lastname@example.org.