almost zero water absorption:0.004%;
anti acid& alkali,
full body no hole, any cutted side could be polished as brilliant shining as surface: glossness 95 ;
surface hardness: 7 mohs degree,
high compression strength: 366mpa;
high bending strength: 82.6mpa;
anti bacteria since full body no hole;
no radiation;
no any heavy metal substance;
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