Bible Encyclopedias
Ruby
Kitto's Popular Cyclopedia of Biblical Literature
The word rendered 'ruby' in the Authorized Version (;;;;; ) appears rather to indicate 'pearls.' The ruby is, however, generally supposed to be represented by the word rendered 'agate' in , and . The Oriental ruby is distinguished for its vivid red color, and was regarded as the most valuable of precious stones next after the diamond.
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Bibliography Information
Kitto, John, ed. Entry for 'Ruby'. "Kitto's Popular Cyclopedia of Biblical Literature". https://www.studylight.org/​encyclopedias/​eng/​kbe/​r/ruby.html.