Three handmade bracelets one from smooth black onyx agate stone mixed with silver non changeable color chain and black non changeable color chain.
onyx, striped, semiprecious variety of the silica mineral agate with white and black alternating bands. Onyx is used in carved cameos and intaglios because its layers can be cut to show a colour contrast between the design and the background. 
 
Medical Benefits of Onyx :
It is used to strengthen heart, kidney, hair, eye and nail.
It is said that onyx helps those who have sleeping disorders.
It eliminates stress, apathy and neurological disorders.
It is beneficial for eye ailments like glaucoma.
 
Working Hours:
These bracelets took from 6-8 working hours