indicolite

As a noun indicolite is

an indigo-blue variety of tourmaline.

As nouns the difference between taxonomy and indicolite

is that taxonomy is the science or the technique used to make a classification while indicolite is an indigo-blue variety of tourmaline.

Elbaite is a synonym of indicolite.

As nouns the difference between elbaite and indicolite

is that elbaite is (mineral) a sodium-lithium-aluminium borosilicate mineral of the tourmaline group, prized as a gemstone while indicolite is an indigo-blue variety of tourmaline.

As nouns the difference between tourmaline and indicolite

is that tourmaline is a complex black or dark coloured borosilicate mineral while indicolite is an indigo-blue variety of tourmaline.

As a proper noun blue

is an anglicization of (etyl) blau.

As a noun indicolite is

an indigo-blue variety of tourmaline.