Bible Encyclopedias
Phosphorite
1911 Encyclopedia Britannica
in mineralogy, the name given to impure massive apatite (q.v.; see also Phosphates).
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Phosphorite'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/p/phosphorite.html. 1910.