Bead, Tourmaline (Natural), 7-8mm smooth Tear B- Grade, Mohs Hardness 7, Sold Per 14nch Strand - Tourmaline (tur-mah-Leen) is a crystal 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.
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