ruby

A clear, deep, red variety of corundum, valued as a precious stone.

They respond instantly to the faintest rustling in the covert of a sheaf of Ulysses S. Grants, or the homely, rustic tinkle of a wheelbarrow full of rubies being jounced along over a nightclub floor.

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.

A deep red colour.

When now I thinke you can behold such sights, / And keepe the naturall Rubie of your Cheekes, / When mine is blanch'd with feare.

The tincture red or gules.

Elgin. Topaz a Saltier and Chief Ruby, on a Canton Pearl a Lyon Rampant Saphyr, which last is their paternal Coat; and the Field Topaz, and Saltier, and Chief Ruby, was the Arms of King Robert the Bruce, they altering the Field from Pearl (as he bore it) to Topaz.

The Field is Ruby, on a Bend Topaz, three Martlets Diamond. [...] Checkie Topaz and Saphire, a Fesse within a Bordure Ruby, by the Name of Clifford.

A ruby hummer, a South American hummingbird, Clytolaema rubricauda.

A red bird-of-paradise, Paradisaea rubra.

Of a deep, red color; ruby-red.

To make red; to redden.

With sanguine drops the walls are rubied