From The Collaborative International Dictionary of English v.0.48 [gcide]:
Zaratite \Zar"a*tite\, n. (Min.) [Named after Gen. Zarata of
Spain.]
A hydrous carbonate of nickel occurring as an emerald-green
incrustation on chromite; -- called also emerald nickel.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Emerald \Em"er*ald\, a.
Of a rich green color, like that of the emerald. "Emerald
meadows." --Byron.
[1913 Webster]
Emerald fish (Zo["o]l.), a fish of the Gulf of Mexico
(Gobionellus oceanicus), remarkable for the brilliant
green and blue color of the base of the tongue; -- whence
the name; -- called also esmeralda.
Emerald green, a very durable pigment, of a vivid light
green color, made from the arseniate of copper; green
bice; Scheele's green; -- also used adjectively; as,
emerald green crystals.
Emerald Isle, a name given to Ireland on account of the
brightness of its verdure.
Emerald spodumene, or Lithia emerald. (Min.) See
Hiddenite.
Emerald nickel. (Min.) See Zaratite.
[1913 Webster]