It is believed that Larimar was first discovered in 1916 by a priest in Barahona, Dominican Republic. The priest requested a permit to mine a blue rock he had discovered. Apparently blue rocks had no value in 1916 as the permit was rejected and Larimar would have to wait almost 60 more years to be re-discovered.
For 6000 years ago, mankind has been fashioning jewelry from Variscite. Pliny The Elder recorded mention of a stone called Callais (callenite) and when a set of Neolithic beads were found in France, the beads were named after that stone. The beads were thought to be turquoise, but that was quickly disproven. Some scholars thought this proved a Neolithic trade route between Europe & Asia, but Variscite was subsequently found in Italy. Still this is proof of a wide ranging Pan-European gem trade as early as 4000 BC