ruby glass

American  

noun

1. glass having a red color resulting from the addition of gold, copper, or selenium to the batch.

2. any glass of a dark red color.

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ruby glass British  

noun

1. glass that has a deep rich red colour produced from oxides of various minerals, such as lead, copper, and iron

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Etymology

Origin of ruby glass

First recorded in 1790–1800

Example Sentences

Though a fork and knife make one feel civilized while digging into the roast, this ruby glass of Rioja Alta doesn’t hurt.

From Salon • Nov. 8, 2025

Even without the guns, bullets, and ruby glass guys, Superhot would still be a pleasurable ballet simulator, with you dodging strings of red, in a fleet footed dance.

From The Verge • Feb. 25, 2016

Maybe human isn’t the best word to describe the characters, a race of mannequins made of ruby glass.

From The Verge • Feb. 25, 2016

Light flickered on bits of ruby glass and on sensitive capillary hairs in the nylon-brushed nostrils of the creature that quivered gently, gently, gently, its eight legs spidered under it on rubber-padded paws.

From "Fahrenheit 451" by Ray Bradbury

Glass containing gold behaves in almost precisely the same way, but the ruby glass is less crimson than copper ruby glass.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" by Various