Tourmaline. A mineral occurring in three-sided prisms. Black tourmaline is the most common variety, but there are also other varieties, as the blue (indicolite) red (rubellite); also green, brown and white. The red and green varieties, when transparent, are valued as jewels. The finest ones come from Maine, and are worth four or five times as much as garnets.

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“Did Christ love you without any motive to draw His love, then will you not love Christ, in whom there are so many motives to draw your love?”
–Thomas Vincent, The True Christian's Love to the Unseen Christ