Rectangular Tourmaline Charm Pendant Necklace with Diamonds, 24kt Gold and Silver by Prehistoric Works of Istanbul, Turkey. Tourmaline - 5.10 cts, Diamonds - 0.06cts. Measures 7mm x 24mm, chain options available. Tourmaline has been said to be a stone of reconciliation, a stone that fosters compassion and cool headedness, radiates the energy that attracts money, healing and friendship, and is used for grounding purposes, to stabilize, and reaffirm our Earth roots.