Top-Ranked Fine-Grained Categories of corundum: =>see poetic categories

• hard:substance,
• heavy:mineral,
• inorganic:particle,
• hard:material,
• industrial:mineral,
• refractory:part,
• colored:stone,
• refractory:material,
• hard:abrasive,
• rare:mineral,
• abrasive:particle,
• crystalline:material,
• powdered:abrasive,
• harder:material,
• hard:mineral,
• hard:particle,
• friendly:material,
• abrasive:stone,
• common:substrate,
• natural:particle,
• solid:particle,
• resistant:mineral,
• abrasive:substance,
• synthetic:material,
• natural:material,
• precious:stone,
• hard:stone,
• abrasive:mineral,
• color:stone,
• natural:mineral,
• grown:material,
• lightweight:abrasive,
• crystalline:mineral,
• synthetic:stone,
• common:mineral,
• charged:mineral,
• metamorphic:mineral,
• foreign:mineral,
• abrasive:aggregate,
• hard:rock,
• dense:material,
• industrial:stone,
• polished:mineral,
• precious:mineral,
• crystalline:substance,
• natural:abrasive,
• stable:mineral,
• crystalline:solid,
• simple:mineral,
• harder:mineral,
• residual:mineral,
• nonvolatile:component,
• inorganic:solid,
• synthetic:topaz,
• aluminous:mineral,
• usual:material,
• refractory:mineral,