chrysoberyl

American  

[kris-uh-ber-uhl] / ˈkrɪs əˌbɛr əl /

noun

1. a mineral, beryllium aluminate, BeAl 2 O 4 , occurring in green or yellow crystals, sometimes used as a gem.

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chrysoberyl British  

/ ˈkrɪsəˌbɛrɪl /

noun

1. a rare very hard greenish-yellow mineral consisting of beryllium aluminate in orthorhombic crystalline form and occurring in coarse granite: used as a gemstone in the form of cat's eye and alexandrite. Formula: BeAl 2 O 4

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Etymology

Origin of chrysoberyl

1350–1400; Middle English < Latin chrȳsoberyllus < Greek chrȳsobḗryllos, equivalent to chrȳso- chryso- + bḗryllos beryl

Example Sentences

Also the more valuable chrysoberyl cat's-eye may be confused with the cheaper quartz cat's-eye unless one is well acquainted with the respective appearances of the two varieties.

From A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public by Wade, Frank Bertram

Some other minerals in which it occurs are phenakite, euclase, and chrysoberyl.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

The ancient stone was not improbably our chrysoberyl, and it is doubtful whether the modern chrysoprase was known until a comparatively late period.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" by Various

In this group may be mentioned the opal, amethyst, agate, rock-crystal, and the like, as the best known examples, whilst oxygen appears also mostly in the form of oxides, in chrysoberyl, spinel, and the like.

From The Chemistry, Properties and Tests of Precious Stones by Mastin, John

Cymophane, or chatoyant chrysoberyl, may also be asteriated.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various