A coarse grained rock of dark gray color, in which labradorite is the chief mineral.

The waters were deep and black, the shores were steep and rocky, and some labradorite was seen.

The bed of the country here is Archæan rock, and many beautiful specimens of labradorite dot the shores.

And so with labradorite and brazilite.

He pointed out Toronto's only example of lustrous black labradorite, from Nain, flashing blue in the sunlight on Eglinton Avenue.