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Webster 1913 Edition

Noun.

[L.

indicum

indigo +

-lite

: cf. F.

indicolithe

(Min.)

A variety of tourmaline of an indigo-blue color.

Noun.

[indigo, or indico,and a stone.]

In mineralogy, a variety of shorl or tourmalin, of an indigo blue color, sometimes with a tinge of azure or green.

indicolite ‎(plural indicolites)