indicolite


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indicolite

[in′dik·ə‚līt]
(mineralogy)
An indigo-blue variety of tourmaline that is used as a gemstone. Also known as indigolite.
References in periodicals archive ?
About 20% of the indicolite is of the finest gem quality, and it is these crystals that make the mine economically viable; even so, it is an enormous effort to meet all expenses and still show a profit.
These were the first indicolite cat's-eyes I had ever seen or heard of coming from the Tourmaline Queen mine.
When we were just a few feet beyond the indicolite mini-pocket, we began removing huge gobs of damp red clay that filled broad fractures between disjointed boulders of the core zone pegmatite.
In the failing light of day, we removed double-handfuls of sandy, pale tan pocket clay bristling with more loose floater pencils of very nice blue indicolite tourmaline.
75 inches, attached to matrix supporting an array of colorful pink tourmaline crystals, all with indicolite rinds and terminations, some of them up to 0.
4-inch crystals in this pocket started their growth about an inch and a half apart, one a classic blue-cap elbaite, and the other with a pink base that transforms mid-way into a pure blue indicolite.
The Golconda mine, near Governador Valadares, has produced a pocket of gemmy, plumose, brush-like indicolite crystals (to 8 x 2 cm).
In Kazakhstan the Kalban district has produced some fine bicolored green-red tourmalines as well as rare, flawless indicolites to 5 cm.