Sepiolite: Physical Characteristics: 1 Different colors: White, Pale yellow, light gray, dark green and etc. 2 Hardness: 2-2.5 3 Density: 1-2.3 4 High-temperature resistance 5 Absorbability: it can absorb 150% more than its own weight Elements: SiO2 54-60% MgO 21-25%