Prayer rope 33 knots made of jet & boxwood
Jet or else Black Stone ''Melan ilektron'' as they called him the ancient Greeks named according to the etymological sources, the city of Lycia Gagai. The jet belongs to lignite, the rock created millions of years ago from organic matter (mainly logs), which received enormous pressure. Other names in euphemism that is known is jet black Amber and Black Jasper.
The Prayer Ropes (or prayer beads) from jet was particularly popular in Russia of the 19th century because of silvery black and symbolism that has been in the Orthodox monasticism. In the town of Irkutsk, Siberia, where it has identified the major reservoir jet, the city's cathedral is decorated with a jet.