a dark-colored spinel containing iron
Ceylonite and pleonaste are dingy blue or grey to black varieties of spinel. Ceylonite, named for the island of Ceylon, is a ferroan spinel with Mg:Fe from 3:1 and 1:1, and little or no ferric iron. Pleonaste is named from the Greek for 'abundant,' for its many crystal forms, and is distinguished chemically by low Mg:Fe ratios of approximately 1:3. Ceylonite and pleonaste are historical terms in mineralogy. Nevertheless, both terms are used in the current mineralogical literature.
The numerical value of ceylonite in Chaldean Numerology is: 7
The numerical value of ceylonite in Pythagorean Numerology is: 9
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