1 pcs 蓝色, 绿色 帕拉伊巴碧玺 - 6.30 ct - 美国宝石研究院（GIA）

gia 珠宝学报告

tourmaline origin report

gia 报告 6565422711

september 30, 2026

details

item description: one loose stone

weight: 6.30 carats

measurements: 11.14 × 10.99 × 7.35 mm

shape: cushion

color: greenish blue

transparency: transparent

cutting style: modified brilliant cut

results

species: tourmaline

geographic origin: mozambique

trade name: paraiba

additional results: scan qr code for more information

comments

this copper and manganese bearing tourmaline may be called “paraiba tourmaline” in the trade.

any statement on geographic origin is an expert opinion based on a collection of observations and analytical data.

tourmaline

tourmaline comes in every color of the rainbow and can even have multiple colors in the same stone, such as “watermelon” tourmaline, displaying pink on the inside and green on the outside. tourmaline’s name comes from the sinhalese word “toramalli,” which translates to “stone with mixed colors.” significant sources of tourmaline include brazil, namibia, nigeria, mozambique, and the united states.

characteristics

* mineral: tourmaline
* mohs hardness: 7–7.5
* toughness: good
* birthstone: october

to learn more about how gia determines and classifies gemstone origin, visit this report.

the results documented in this report refer only to the article examined and were obtained using the techniques and equipment used by gia at the time of examination. this report is not a guarantee or valuation. for additional information and important terms and disclaimers, please see gia.edu/terms or call +1 800 421 7250.