Mohs Hardness: 6-6.5
Bulk Density: 130 lbs cuft

• Mined Staurolite Sands 
• Round and Subangular Shaped Media
• Coating and Rust Removal
• Tests have show it to breakdown faster and produce more dust than Garnet, Crushed Glass and Coal Slag 
• Starblast™ guaranteed to contain <3% free silica, typically <2%