Paraiba-type Tourmaline"Paraiba-type" TourmalineMozambique A large cushion-cut blue-green tourmaline showing excellent luster and a rich saturation of hue which is known in the trade as "paraiba-type". Weighing approximately 24.73 carats and measuring 19.32 x 16.97 x 12.01mm Accompanied by a Gemological Institute of America report numbered 2195020152 dated January 16, 2018 stating that the violet brilliant cut 24.73 carats stone is natural tourmaline. Although this tourmaline contains copper and manganese, the properties are not consistent with what is called "paraiba tourmaline" in the trade. This tourmaline does not show any indication of heating.Accompanied by an American Gemological Laboratory report number 111787 dated October 5, 2021 stating that the Blue-Green tourmaline is natural "Paraiba-type". Paraiba-type is a term/color variety applied by the AGL to the copper-bearing variety of elbaite tourmaline which was first discovered in the Paraiba state of Brazil, but may have originated from a different source. The present stone is stated to originate from Mozambique. This color variety of tourmaline is commonly the result of a relatively low temperature heating process. Tourmalines may be clarity enhanced to reduce the visibility of fissures. The stability of this type of enhancement is very good to good. Degree of clarity enhancement: Minor.