The da Vinci's Circle in lapis lazuli

The same puzzle as our wooden piece of the same name, with every wooden part cut from lapis lazuli instead. Each part is shaped from one piece of stone, polished by hand, and every edge and corner is rounded so the stone does not chip where the cord pulls across it.

Lapis lazuli is a royal blue stone with small flecks of gold pyrite. At 5 to 5.5 on the hardness scale it is softer than quartz, so keep it away from keys and grit.

The cord is the same as on the wooden piece, so the solution is the same. We can cut it in rose quartz, amethyst, nephrite jade, lapis lazuli, black onyx, red jasper, tiger’s eye or smoky quartz.