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HPJ REFERENCE POINT: FABULOUS 12.30 CT FLAWLESS SWISS BABY BLUE BRAZILIAN TOPAZ PAIR
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Reference Point
BEAUTIFUL 12.30 CARAT FLAWLESS ‘SWISS BABY BLUE’ BRAZILIAN TOPAZ PAIR
GEM TYPE: TOPAZ
CARAT WEIGHT: 12.32 CARATS
COLOUR: SWISS BABY BLUE
CLARITY: IF
DIMENSIONS: 10.74 x 10.74 x 7.21mm
CUT: ROUND CUT
ORIGIN: MINAS GERAIS, BRAZIL
TREATMENTS: ROUTINELY TREATED
Deposits of Topaz have been found in Brazil, Afghanistan, Australia, Myanmar (Burma), China, Germany, Japan, Madagascar, Mexico, Namibia, Nigeria, Pakistan, Russia, Zimbabwe, Sri Lanka, Ukraine and the USA. Natural light-blue Topaz is found in Northern Ireland and the UK. Enormous Topaz crystals have been discovered in Minas Gerais (Brazil) and Ukraine.
MINERAL: TOPAZ
CHEMISTRY: Al2(F,OH)2SiO4
REFRACTIVE INDEX: 1.619 to 1.627
BIREFRINGENCE: 0.008 to 0.010
SPECIFIC GRAVITY: 3.53
MOHS HARDNESS: 8
MINAS GERAIS
During the last 100 years, the cities of Governador Valadares, and Teófilo Otoni,to the north-east, have established themselves as major hubs of the gem-trading industry, due to their proximity to some of the richest gem deposits in Brazil.
During the 1700s, when Minas Gerais was under Portuguese control, gold and gem mining labor was conducted by slaves taken from the west coast of Africa. This accounts for the large percentage of African descendants who now populate the region.
