Subcategories:
— measured by area only (1)
— mouldable or workable (15)
— permeable (4)
— polishable (2)
— spinnable (2)
— fusible (2)
— unable to be softened by heat (1)
— quick-setting (2)
— alkaline (3)
— processable (1)
— calcinable (1)
— not employed in building (1)
— lubricant (3)
— set aside for reuse or recycling (2)
— unused (1)
— resistant to wear (3)
— other types (6)
— soundness of material (1)