Black Onyx cabochon.
Grooved stone for macrame.
Here is a new range of gemstone cabochons that will particularly please our micro-macrame fans!
Indeed the peculiarity of this cabochon is that it is grooved on its entire slice.
This groove makes it possible to use it with a thread of 1 mm without it to slip.
You will be able to set your cabochons easily.
Details:
Length: 25 mm
Width: 18 mm
Attention, each piece is unique and can present significant differences with the photo.
The onyx belongs to the Chalcedony family. Black onyx stone is not originally black. It is treated by being immersed in a solution of black sugar and acid. The soft, porous nature of the stone allows the solution to soak in. After immersion, the stone is then heated. This is a common process that makes the colour deeper and longer lasting.
Sold individually.
