Webster's 1828 Dictionary
CEYLANITE
n.A mineral, classed with the ruby family; called also pleonaste. Its color is a muddy, dark blue, and grayish black, approaching to iron black. It occurs in grains, or small crystals, either perfect octahedrons, or truncated on the edges, or with the angles acuminated by four planes. It occurs also in rhomboidal dodecahedrons.
Webster's 1913 Dictionary
CEYLANITE
Cey "lan *ite, n. Etym: [F., fr. Ceylan Ceylon. ] (Min. )
Defn: A dingy blue, or grayish black, variety of spinel. It is also called pleonaste. [Written also ceylonite.]
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