Item

80

92

95

99

Al2O3%

≥80%

≥92%

≥95%

≥99%

Bulk density

≥3.3g/cm3

≥3.63g/cm3

≥3.7g/cm3

≥3.8g/cm3

Harness(Mohs)

8

9

9

9

Water absorption

<0.01%

<0.01%

<0.01%

<0.01%

Appearance color

White (yellowish)

White

White

Yellow

Compression strength

255

275