... , pigment and auxiliariesHardness : 7.5 Moh's, uneasy out of shapeDensity: 2.38g/m3 , high resistance to abrasion, compression, ... Advanced production line 3. Professional stone processing factory 4. Timeline meet 5. Affordable 6. Competitive price FAQHow do i ... LEESTON Quartz contains approximately 93% quartz,the hardest components of natural granite,the surface is highly scratch and impact ...