Gem, Rock, and Mineral Postage Stamps Featuring

Mineral Name: Indicolite (a variety of elbaite tourmaline)
Composition: Sodium lithium aluminum boro-silicate hydroxide
Nomenclature: Named after the mineral's color.
Industrial Uses: Gemstones.
Additional Notes: Also known as indigolite. Indicolite is the blue variety of elbaite, which is a member of the tourmaline family of minerals.

Comoro Islands Scott 930i
Indicolite (Tourmaline)
Comoro Islands
Scott 930i
375 francs

The stamp shows a natural, unpolished specimen.
The mineral name is misspelled as "Indigolite" on the stamp. Philatelic Mineralogy Copyright © 1997-2010 by Richard Busch