Are the blue stained glass windows of Chartres Cathedral Templar?

The blue stained glass windows of Chartres Cathedral are renowned for their vibrant colour. They were coloured using a mineral containing cobalt, which is responsible for imparting the deep blue hue. What is known on the origin of the mineral and the colouring proces? And had the Templars something to do with this?

Water power, a Templar tool for industrial development

Towards the middle of the Xlle century, the Militia of the Order of the Temple, invested in milling for the agro-industrial sector and cloth fabrication. An example.