Lowest price:$132.88Description: min .15ct 4mm round paraiba tourmaline from mozambique. paraiba was discovered in 1982 in brazil and is only found in one small area. it is the only tourmaline in the world that contains copper and recent studies have found it to have a relatively high gold content. it is the only stone where teals turquoises and neon blues and greens are found with any consistency. retail prices have been known to exceed $20 000 per carat for fine specimens.