THE GREENISH BLUE
A SUPERB PARAÍBA TOURMALINE AND DIAMOND RING

Set with a oval modified brilliant-cut paraíba tourmaline weighing 12.11 carats within a oval-cut diamond surround, extending to the half-hoop and mounted in platinum.

Accompanied by GIA gemological report dated 28 March 2018, GÜBELIN report dated 5 october 2023 and AGL report dated 7 February 2018, stating that is a 12.11 carat "Paraíba" natural tourmaline with a excelent color stanility.

Paraíba weight: 12.11 carats
Measurements: 15.02 x 12.46 x 8.14 mm
Shape: Oval
Cutting Style, modified brillant cut
Transparency: Transparent
Color: Greenish blue
Total carat weight of diamond:
Diamond Oval: 10 diamonds with total weight of 3.29 carat
Diamond: 62 diamonds with total weight of 1.48 carat

Private collection, Europe

The tourmaline group has been famous for many years in the world of gemstones because it hosts a series of well appreciated gems covering virtually the entire spectrum of colours. Towards the end of the eighties, a new dimension was added to this spectacular group of gems, when top-quality faceted stones of colours never before seen in tourmaline began entering the international gem market. Shortly thereafter, it became apparent that these remarkable gems were originating from a newly discovered source known as São José de Batalha, in the north-eastern state of Paraíba, Brazil. These so-called Paraíba Tourmalines immediately became prized for their vivid coloration, which ranged from blue to violet and blue-green through pure green to yellowish green.

The Paraíba state remains the original source of these exclusive gems, however, other deposits of this tourmaline colour variety in the Rio Grande do Norte state, Brazil and Nigeria precludes Paraíba's exclusive claim to the sole source of these rarities. A special geological-mineralogical association resulting in a very particular genetic environment is the cause for the formation of this outstanding tourmaline variety. Concentrations of copper and manganese are directly responsible for the bright and intense colours only encountered in the tourmalines from these deposits. Another consequence of the special growth environment is the fact that typically only relatively small gem-quality crystals tend to form.