Thulite (also known as Rosaline) is a translucent, crystalline, massive, pink, manganese-bearing variety of Zoisite. It is often mottled with white Calcite, it occurs as veins and fracture fill-up. It is also sometimes referred to as Pink Zoisite.

First identified in 1820 in Sauland in Telemark, Norway- Thulite was named after the mythical land of Thule. This land was mentioned in ancient Greek and Roman literature and maps as the northernmost land known to them. These areas may have been Orkney, Shetland, Northern Scotland, the island of Saaremaa in Estonia, or the Norwegian island of Smøla. Over time, Thule was gradually used in reference to Greenland, Iceland, Scandinavia, and Norway.

The box was created by master stone cutter and expert lapidary artist, Konstantin Libman, in his studio in St. Petersburg. The interior of the box is lined with Spanish Cedar and the lid is fitted with two Gold-plated brass hinges. The bottom and sides are made of black Dolerite which contains flecks of glass creating a glimmering effect and finished with felt feet.