For your consideration are these natural clear quartz crystal stretch power bracelets, sold by the piece.
The beads are 8mm in diameter. The bracelet itself measure approximately 7 inches long, unstretched, and one size fits most.
Clear quartz is known as the Stone of Power. Produces harmony of the body and mind, allowing one to think more clearly an act effectively. Increases physical and mental energy, perseverance, and patience re-directs negative energy to a positive state. Enables one to laugh and love more easily. Amplifies the energy of other stones, as well as amplifies the energy of intention.
Chakra: Crown