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    Tourmaline

    Tourmaline is a crystalline boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gemstone comes in a wide variety of colors. Tourmaline was sometimes called the "Ceylonese [Sri Lankan] Magnet" because it could attract and then repel hot ashes due to its pyroelectric properties. Tourmaline is rated between 7 and 7.5 on the Mohs hardness scale.  Tourmaline is associated with optimism and spirit, as well as imagination and dreams.