elroquiten.

/ɛlˈrɒkʌɪt/Etymology: < El Roque, name of an island in the Caribbean Sea: see -ite suffix1.
Mineralogy.
1882 J. D. Dana App. iii. 41 Elroquite..an apple green to grey, massive substance.
This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2018).