Size of flat cylinders of black Onyx; approx. 2,5 x 4,0mm; length of Onyx strand approx. 40cm.
The name Onyx is derived from the Greek word "onyx" for "nail"; presumably this name, which has been in use for many centuries, refers to the surface of the polished stone, which resemble shiny fingernails. Spellings like onix or onyk are therefore not correct.