Heart Of Earth And Sky - Four Bowl Key Of F Harmonic Interval Frosted Set

A Foundation in Harmony

Harmonic Interval Frosted Sets have defined the Sunreed™ approach to sound healing. Carefully built around timeless musical intervals, they create rich, spacious harmonies that are remarkably easy to play while offering an inviting foundation for meditation, sound baths, and therapeutic practice. Their simplicity allows the relationships between the bowls do the work, creating a balanced and uplifting atmosphere that is undeniably effective.

Heart of Earth and Sky

These key of F sets represent the preference and practice of our teachers, Zacciah Blackburn and Dorothy Stone. Between 14" and 8" sizes, this set represents both the lowest and highest in tone you can get for frosted bowls, offering a expansive potential for working with deep grounded earth energies, to the high elation of the 8" C, and the wonderful harmonics in between.

This Set, and Expansion

The bowls in this set are:

• 3rd octave 14" F
• 4th octave 12" C
• 4th octave 10" F
• 5th octave 8" C

This set can be expanded upon in the future, adding in binaurals, further harmonics, or can be expanded upon into a full chakra or pentatonic scale set. Contact us when you are ready, and we can provide sound files for all the different potentials. 

Choosing Between Harmonic Bowl Sets

Each harmonic set creates a wonderful uplifted environment. So much can be achieved with just a few harmonic bowls. As additional bowls are introduced, the ability for creating harmonic melodies naturally expands.

The best way to hear these differences is by listening to the sound samples provided on each product page. If you're unsure which set is right for your practice, we're always happy to speak with you and help you choose the collection that best fits the way you work.

Choosing a Key

Harmonic sets are offered in different keys (ex. Key of C, A or F)

The relationships between notes remain the same, while the overall pitch shifts:

• Key of F — For the deepest grounding, and greatest range of tone
  
• Key of A — A middle ground, for offering depth of tone with a balanced expression
  
• Key of C — A classic standard, sweet and clear in tone and ready for angelic elation

There is no right answer. Selection is often based on listening preference and feel.

432Hz or 440Hz Tuning

These sets are available in:

• 440Hz — the international standard for musical tuning
  
• 432Hz — a slightly lower pitch across all notes
  

All bowls are tuned within ±5 cents of perfect pitch, ensuring clear and stable harmonic relationships.

All Accessories Included

Sunreed™ provides all the tools you'll need, standard with each set:

• Three versions of upgraded silicone-based strikers, each offering a unique playing feel and tonal response
• Premium-grade silicone O-rings for stable placement and optimal resonance
• Our classic nesting carrying cases, designed to safely store and transport your bowls while keeping the overall set as compact and portable as possible.

*See the "What's Included" tab below for full information.

Build Quality & Guarantee

Every frosted crystal singing bowl is individually played and inspected before it leaves Sunreed™.

Each bowl is tested at least three separate times, allowing us to evaluate the quality of the rim, ease of play, tuning accuracy, clarity of voice, and quality of sustain. Only bowls that meet our standards become part of a complete set.

If, for any reason, you feel that one of the bowls in your collection does not meet your expectations, please contact us. We're always happy to help and will work with you to ensure you receive the best instrument possible.

Thoughtfully Chosen Bowl Sizes

Through years of working with frosted crystal singing bowls, we've found that certain bowl sizes consistently produce the clearest expression for each note. These proportions provide a quality playing experience, allowing each bowl to speak easily while maximizing sustain, volume control, and creating a rich, coherent tone.

Precise Tuning

Each bowl in our sets is selected for its clarity, tone, and precise tuning.

Tuning plays a central role in how harmonies are experienced. When bowls are closely aligned in pitch, the relationships between notes become more coherent—creating a smoother, more stable field of sound.

All bowls are crafted from premium-grade crystal and are tuned within ±5 cents of perfect pitch, exceeding common industry standards.

The result is a set that plays together as a unified system—clear, balanced, and consistent across the full range.