1.71 ct Paraiba-Type Tourmaline — GIA Report

Collector's Note
A lovely green-blue tourmaline with the characteristic electric color collectors associate with Paraiba-type gems. This transparent 1.71 ct oval is cut in a modified brilliant style, giving it lively face-up brilliance and a distinctive tropical blue-green appearance. GIA identifies it as a copper- and manganese-bearing tourmaline that may be called “Paraiba tourmaline” in the trade.

Gemstone Details
Gemstone: Tourmaline
Trade Name: Paraiba-type Tourmaline
Weight: 1.71 ct
Shape / Cut: Oval Modified Brilliant Cut
Measurements: 8.69 × 6.16 × 4.91 mm
Color: Green-Blue
Origin: Mozambique
Treatment: Heated (standard for Paraiba tourmaline)
Otzera ID: OTZ-2026-00325

O50 Collector Evaluation
Otzera 50: 39/50 — Distinguished

Treatment & Origin Disclosure
Copper-bearing Paraiba tourmaline is routinely heated to clear purplish tones and reveal its vivid blue-green. The change is permanent and needs no special care. Origin is Mozambique, as indicated by GIA’s testing; it is not printed on the report because the optional origin service was not requested. GIA identifies the stone as a copper- and manganese-bearing tourmaline and states that it may be called “Paraiba tourmaline” in the trade.

Laboratory Documentation
Accompanied by GIA Tourmaline Report No. 5191602078.

Care & Setting
Tourmaline is suitable for jewelry wear with sensible care. Clean with warm water, mild soap and a soft brush; avoid sharp impacts and sudden temperature changes.

Digital Gem Passport
Accompanied by an Otzera Digital Gem Passport preserving its identifying details, laboratory documentation and O50 evaluation.