Min. [Named after R. Kirwan, an Irish mineralogist (1733–1812): see -ITE1.] A fibrous, green, chlorite-like mineral, found in the basalt of the North of Ireland.
1811. Pinkerton, Petral., I. 561. Kirwanite.
1833. Philos. Mag., III. 85. Kirwanite—Found by Mr. P. Doran in the Greenstone and Porphyry of Mourne, and named by Dr. Thomson.
