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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“Prayer and thanks are like the double motion of the lungs, the air that is sucked in by prayer is breathed forth again by thanks.”
–Thomas Goodwin, The Return of Prayers