The gemstones associated with zodiac signs and months have changed over the centuries. Sometimes a gemstone will be replaced, other times additional gems will appear as alternates. Such is the case with the October birthstone. While opal has long been associated with that month, tourmaline is a more modern addition. The name comes from the Sinhalese word toramalli, which means “stone with mixed colors,” because it often has multiple colors in one crystal. One example is the aptly named 'watermelon tourmaline'.
This beautiful gemstone comes in a variety of colors, from pinks and reds (rubellite) to an emerald green (chrome) and the more neon blue-green and violet colors (Paraiba). There is even a black variety.
Black tourmaline is believed to protect the wearer and give a sense of self-confidence. Pink tourmaline embodies love and is associated with compassion and gentleness. Green tourmaline promotes courage, strength, and stamina.