Quartz Stone

We are seeking quartz powder in 325mesh, 500mesh, and 800mesh specifications. Initial requirement is 1kg samples for testing, followed by 25kg validation batches. Bulk procurement will scale to 1T quantities for mass production.  

Delivery must be arranged via air freight from Asia to Spain. Please provide EXW/FOB quotations for 1T orders. Clarify minimum order quantities and lead times for each specification.