emerald

Any of various green gemstones, especially a green transparent form of beryl, highly valued as a precious stone.

Although there are dozens of different types of gems, among the best known and most important are diamond, ruby and sapphire, emerald and other gem forms of the mineral beryl, chrysoberyl, tanzanite, tsavorite, topaz and jade.

Emerald green, a colour.

Vert, when blazoning by precious stones.

16. As the first. Crest, on a Mount Emerald, a Falcon rising Topaz.

Crest. On a Wreath, a demi Dragon, Emerald, armed and langued, Roby [...] Supporters. Two Dragons reguardant, Emerald, [...]

Any hummingbird in the genera Chlorostilbon and Elvira; and some in the genus Amazilia

Any of various species of dragonfly of the family Corduliidae.

Of a rich green colour.

The insect-queen of eastern spring, / O'er emerald meadows of Kashmeer / Invites the young pursuer near, / And leads him on from flower to flower / A weary chase and wasted hour.

To ornament with, or as if with, emeralds; to make green.