Olivine Sand, Color : Green, Form : Crystal for Refractory Brick

Olivine sand  
specs: 
MgO 40-45% Min   
SiO2 41-45% Max   
Fe2O3 10% Max 
L O I  5% Max 
Size: 1-5mm, 2-6mm 95% Min or at option. 
Calcined Olivine sand  
specs: 
Mgo>43.5%,
SiO2