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glass having a red color resulting from the addition of gold, copper, or selenium to the batch.
any glass of a dark red color.
glass that has a deep rich red colour produced from oxides of various minerals, such as lead, copper, and iron


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  • Rubys

    noun 1. a female given name. noun (pl) -bies 1. a deep red transparent precious variety of corundum: occurs naturally in Myanmar and Sri Lanka but is also synthesized. It is used as a gemstone, in lasers, and for bearings and rollers in watchmaking. Formula: Al2O3 2. the deep-red colour of a ruby (as adjective): […]

  • Ruby-silver

    noun, Mineralogy. 1. proustite. 2. pyrargyrite. noun 1. another name for proustite, pyrargyrite

  • Ruby-spinel

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

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