Hi Endzone,

We chose the supplier of raw quartz because we knew that they also supply quartz to traditional silicon metal producers and we had tested the material in the past during our Gen 2 QRR testing.

Yes, the purity should be around 99.5% SiO2, and we will be using it to benchmark our end product versus traditional processes. 

The feedstock SiO2 purity issue for the QRR will be more based on the end product we are looking at making.

Regards

Bernard Tourillon