sardonick

I caught this morning morning's minion, king-
   dom of daylight's dauphin, dapple-dawn-drawn Falcon, in his riding
   Of the rolling level underneath him steady air, and striding
High there, how he rung upon the rein of a wimpling wing
In his ecstasy! then off, off forth on swing,
   As a skate's heel sweeps smooth on a bow-bend: the hurl and gliding
   Rebuffed the big wind. My heart in hiding
Stirred for a bird,-the achieve of; the mastery of the thing!

Brute beauty and valour and act, oh, air, pride, plume, here
   Buckle! And the fire that breaks from thee then, a billion
Times told lovelier, more dangerous, O my chevalier!

   No wonder of it: sheer plod makes plough down sillion
Shine, and blue-bleak embers, ah my dear,
   Fall, gall themselves, and gash gold-vermillion.

— Gerard Manley Hopkins, early 1900s