oriental ruby
Corundum Co*run"dum (k[-o]*r[u^]n"d[u^]m), n.; pl. {Corundums} (k[-o]*r[u^]n"d[u^]mz). [Also corindon.] [From Hind. kurand corundum stone.] (Min.) The mineral alumina ({Al2O3}), as found native in a crystalline state. Transparent varieties are used as gemstones, including {sapphire}, which is the fine blue variety; the {oriental ruby}, or red sapphire; the {oriental amethyst}, or purple sapphire; and {adamantine spar}, the hair-brown variety. It is the hardest substance found native, next to the diamond. [1913 Webster +PJC]

Note: The name corundum is sometimes restricted to the non-transparent or coarser kinds. {Emery} is a dark-colored granular variety, usually admixed with magnetic iron ore. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • oriental ruby — noun The true ruby, a variety of corundum • • • Main Entry: ↑orient …   Useful english dictionary

  • Ruby — Ru by, n.; pl. {Rubies}. [F. rubis (cf. Pr. robi), LL. rubinus, robinus, fr. L. rubeus red, reddish, akin to ruber. See {Rouge}, {red}.] 1. (Min.) A precious stone of a carmine red color, sometimes verging to violet, or intermediate between… …   The Collaborative International Dictionary of English

  • Ruby of arsenic — Ruby Ru by, n.; pl. {Rubies}. [F. rubis (cf. Pr. robi), LL. rubinus, robinus, fr. L. rubeus red, reddish, akin to ruber. See {Rouge}, {red}.] 1. (Min.) A precious stone of a carmine red color, sometimes verging to violet, or intermediate between… …   The Collaborative International Dictionary of English

  • Ruby of sulphur — Ruby Ru by, n.; pl. {Rubies}. [F. rubis (cf. Pr. robi), LL. rubinus, robinus, fr. L. rubeus red, reddish, akin to ruber. See {Rouge}, {red}.] 1. (Min.) A precious stone of a carmine red color, sometimes verging to violet, or intermediate between… …   The Collaborative International Dictionary of English

  • Ruby of zinc — Ruby Ru by, n.; pl. {Rubies}. [F. rubis (cf. Pr. robi), LL. rubinus, robinus, fr. L. rubeus red, reddish, akin to ruber. See {Rouge}, {red}.] 1. (Min.) A precious stone of a carmine red color, sometimes verging to violet, or intermediate between… …   The Collaborative International Dictionary of English

  • Ruby silver — Ruby Ru by, n.; pl. {Rubies}. [F. rubis (cf. Pr. robi), LL. rubinus, robinus, fr. L. rubeus red, reddish, akin to ruber. See {Rouge}, {red}.] 1. (Min.) A precious stone of a carmine red color, sometimes verging to violet, or intermediate between… …   The Collaborative International Dictionary of English

  • ruby sulphur — Ruby Ru by, n.; pl. {Rubies}. [F. rubis (cf. Pr. robi), LL. rubinus, robinus, fr. L. rubeus red, reddish, akin to ruber. See {Rouge}, {red}.] 1. (Min.) A precious stone of a carmine red color, sometimes verging to violet, or intermediate between… …   The Collaborative International Dictionary of English

  • ruby — rubylike, adj. /rooh bee/, n., pl. rubies, adj. n. 1. a red variety of corundum, used as a gem. 2. something made of this stone or one of its imitations, as a bearing in a watch. 3. a deep red port wine. 4. deep red; carmine. 5. Brit. Print. a… …   Universalium

  • Ruby — /rooh bee/, n. a female given name. * * * Gemstone composed of transparent red corundum. Its colour varies from deep to pale red, in some cases with a tinge of purple, depending on chromium and iron content; the most valued is a pigeon blood red …   Universalium

  • ruby — /ˈrubi / (say roohbee) noun (plural rubies) 1. a red variety of corundum, highly prized as a gem (true ruby or oriental ruby). 2. a piece of this stone. 3. any of various similar stones, as the spinel ruby, balas ruby, etc. 4. deep red; carmine.… …   Australian English dictionary

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