The lowest impurity fused silica sand

ChemSize got an special requirements about fused silica sand -8mesh as below:

This refers specifically to Fused Silica Cullet with the following specification:

Size: < Mesh 8

Particle size: 2,400 – 3,000 microns

The material is particularly suitable for the following applications:

Transparency and optical stability for optical applications

Thermal resistance and thermal shock resistance for high-temperature environments

The ordered goods must be tested by a recognized third-party laboratory. Please ensure that the inspection report is issued by an independent lab and provided to us.
Chemical composition requirement:

Our fused silica Grade A Al2O3 is 0.015% and Fe2O3 is 0.005% and other impurity can not meet.
We finally made out follows spec which client is satisfied with: