Chrysocolla (cabochons 81/51/10 mm and 81/51/9 mm) Katanga, AR Congo

Chrysocolla is presented in the form of two very large, beautiful cabochons.
The cost for one cabochon (any of the two) is 3 rubles.
The size of the cabochons:

699 mm length
81 mm - width

High cabochons (51 - 9 mm) - without backing)
A good polishing.
The color is natural, saturated as in the photo, but it is necessary to take into account the difference in color rendering of different devices.

The bluish-blue color of chrysocolla can turn into a darker, brown shade ,usually this phenomenon is caused by the presence of iron and copper oxides..

The saturation of copper-containing solutions varies, so the newly emerging layers often have a different color saturation.

Chrysocolla is very difficult to process due to its porous, often heterogeneous structure - the variety is difficult to polish. The pattern of the stone is explained by its heterogeneous density.
Despite all the difficulties, the masters skillfully bring cabochons from this unique stone to a silky shine...which shows even more vividly all the fascinating bright game with patterned outlines and pictures..