Tourmalines showing unusually striking "Neon" colours of blue, green-blue, green and violet first appeared in the jewellery trade in 1989 when a single deposit was unearthed near the Brazilian village of Sao Jose de Batalha in north-central Paraíba State. Although uncommon in sizes over 2 carats, these majestic stones are always in high demand, attracting extraordinary prices not seen with any other tourmaline variety.
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