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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“Let us not give up meeting together, as some are in the habit of doing, but let us encourage one another – and all the more as you see the Day approaching.”
– Hebrews 10:25