Limited quantity. 
 
Each  Amethyst pendant string measures approximately 24 inches long.
 
Cotton cord and lead-free metal.
 
Not waterproof. 
 
Amethyst’s frequencies are similar to those of the Source Field which flows through everything, especially the brain.  It helps your own personal frequencies flow into the field.
 
Excerpts from Book 3 CREATION: ITS HISTORY, EXPLOSIVE EVOLUTION, AND ET ARRIVALS ON EARTH. (Available on Amazon):
(The Auric Expressions of Different Frequencies) Purple – This is the color of knowledge, often spiritually related. The deeper the purple the greater the depth. It’s also relative to the Crown Chakras, flowing through the Upper Crown of over half of you. It’s a smoother medium frequency and helps calm your brain allowing it to enter the Source Field to access its immense knowledge depositories. Find it in Amethyst.
Amethyst – This stone’s frequencies of accessing knowledge and greater understanding is also beneficial to cleaning, clearing, and clarity.