High silica content versus high purity
Read SiO₂ in context
Read silica content with its method, dry or as-received basis and measurement limits. Ask whether the result represents your lot and how the sample was taken. An isolated number is insufficient to compare offers.
Examine the remaining elements
Materials with similar SiO₂ may differ in iron, alkalis or trace elements. These differences can determine melting behaviour, colour or process compatibility.
Match qualification to the use
Start with the limits your process actually needs. Advanced uses require sensitive methods and dedicated trials. OPR distinguishes industrial enquiries from high-purity quartz projects without assuming lot suitability.
Every application needs a suitable grade and testing. OPR confirms grades, processing and availability; no ultra-high-purity grade or certification is assumed.
Source : USGS — Silica