adjective, ston·i·er, ston·i·est.
Examples from the Web for stoniness
For a man predisposed to stoniness of the heart, this surely was unwholesome liquor.The Man of Adamant|Nathaniel Hawthorne
Rousille ran along the road, unheeding the stoniness of the way.Autumn Glory|Ren Bazin
However, not even Mawson's stoniness could quite repress all her feeling of wonder-growing joy.Rich Man, Poor Man|Maximilian Foster
The lemons, candles, and tobacco had the same astonishing quality of stoniness, and nothing yielded to the touch but the flour.The Frozen Pirate|W. Clark Russell
Gone is the mass of the mountains, the stoniness of rocks, the hard solidity of iron.The Conquest of Fear|Basil King