1. High density 6.02g/cm3 2. Very high wear and tear resistance; 3. Highest operating time is achievable; 4. Low contamination of the grinding product, therefore useable for high-grade grinding of pigments, dyes, pharmaceutical and cosmetic products; 5. useable for all modern types of mills and high energy mills(vertical and horizontal); 6. excellent crystal structure avoids bead breakage and reduces the abrasion of mill parts; 7. no radioactivity in comparison to ceramic beads made of zirconium silicate and therefore no contamication of the grinding product and no costly disposal of the beads.