Gemini D and F Notes Quartz Crystal Singing Bowl #cg7dp25fm10 37000100
D Note Bowl
Note: D +25 cents Octave: 4 Frequency: 298.3 Hz
F Note Bowl
Note: F -10 cents Octave: 4 Frequency: 347 Hz
Frequency Difference: 48.7 Hz (Gamma Binaural)
Both ends of the Gemini bowl are Clear Quartz Crystal, 7 inches in diameter, connected at the base by a hollow handle, allowing for easy handling, without affecting the sustain of the notes.
Rim Thickness: ~2.2 mm
For more information on the 5 Main Brainwaves, you may visit the following link: https://www.silverskyimports.com/pages/information/delta-theta-alpha-beta-gamma-frequency-brain-waves.html