This radiant blue pigment is the only color that has been fired to get this vibrant color. It is composed of 90% earthen clay and 10% man-made, non-toxic minerals, and it is heated in an oven to a high temperature.
The composition of the mineral is Si4O10(OH)2Mg3 Throughout history, blues in nature were very rare and usually made with precious stones like Lapis Lazuli. These stones are now unsustainably harvested in Afghanistan, so we have found this beautiful, non-toxic and sustainably-made alternative. Origin - France / Lightfastness - Excellent