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 colours. Standard Tray – Box measures 18.5cm x 12.5cm. Contains approx. 18-22 pieces depending on size. Each piece measures approx. 3-4cm.
