The supercomplicated movement of Moscow Computus Clock was set into nearly complicated artisanal case made with extensive use of semiprecious stones and composed of more than 2,500 parts carved from stone. The starting point of clock design was St Basil’s Cathedral, the pearl of Russian architecture and the world’s well known symbol of Moscow. The detailed work on the case of the clock took months of work of one of the best Russian artisan of stone mosaic. The case is covered with pieces of plenty of precious and semi-precious minerals and stones. Tricky stone setting technique means that artisan could elaborate just a few pieces of stone decoration a day, as every detail required six to seven finishing touches after each facet was perfectly formed and polished.