1
Of this adamantine rock all the hills were now composed.
2
Here beneath the world, held fast by adamantine rock, impenetrable.
3
The eye ranges over these peaks, and curiously formed lumps of adamantine rock, with astonishment and horror.
4
Isthmuses are usually composed of adamantine rock or of shifting sands-thelatter being much the more refractory material to deal with.
5
The nine-fold gates were of brass, iron, and adamantine rock, reaching high to the mighty roof, and most horrible were the Shapes that guarded it.