Each  Black Kyanite pendant cord measures approximately 27-28 inches long.
 
Cotton cord and lead-free metal.
 
Not waterproof. 
 
Excerpts from Book 3 (CREATION: ITS HISTORY, EXPLOSIVE EVOLUTION, AND ET ARRIVALS ON EARTH. Available on Amazon):
Kyanite – Helps separate unwanted frequencies within you and set them aside for a slow removal. Tourmaline and Amazonite work well with it.
All the Kyanite varieties help disolve or partially disassemble problematic frequencies and slowly remove them.