Chrysocolla/cuprite/dioptase (cabochon 48/23 mm) Katanga. DR Congo

The cost for cabochon.
48mm - length
23 mm - width
5 mm - height
the cabochon on the substrate.
A good polishing.

We have before us the so-called rare manifestation of partial substitution of dioptase veins with chrysocolla (part of the emerald color of dioptase veins is visible on the cabochon), as well as the manifestation of other accompanying minerals and copper-containing carbonates.
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..