Hi Bernard,

On page 10 of the corporate presentation you are showing that one of the products that HPQ could be selling is high purity quartz, the market is smaller than silicon but with and average selling price of more than $5 per kg and a relatively low production cost considering the high purity of some of the quartz on Ronceveaux, providing that you succeed to delineate a sufficient resource on the property during the recently announced drilling program, and considering that a few years ago a major silicon metal producer has confirmed it's interest in purchasing significant tonnage of high purity quartz from Ronceveaux, do you intend to start selling high purity quartz during 2018 and bring an income in the company, or do you intend to keep all the high purity quartz from Ronceveaux for the production of high purity silicon through Purevap ?

Thank you !