ruby spinel

noun

Mineralogy.

1. a deep red, transparent variety of spinel, used as a gem.

ruby spinel

noun

1. a red transparent variety of spinel, used as a gemstone

Word History and Origins

Origin of ruby spinel¹

First recorded in 1830–40

Example Sentences

Similarly, ruby can at once be distinguished from even the finest garnet or ruby spinel, as the last two are singly refracting.

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The "rubies" of the poet's time were frequently ruby spinels, or the so-called "balas rubies" from Badakshan, in Afghan Turkestan.

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The peculiar yellowish character of the red color led us to suspect ruby spinel.

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