1 pcs Grün, Blau Turmalin, Paraiba-Turmalin - 4.16 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Neon Green

Paraiba Tourmaline
- Abmessungen (Länge x Breite x Tiefe in mm) = 10,04 X 8,80 X 6,30
- Reinheit : durchsichtig
- Farbinformationen: blaulich grün, neon grün


ALGT – Antwerp Laboratory for Gemstone Testing

Report Information:

1) Report Date: 20 October, 2020

2) ALGT Report Number: 93813810

Identification

- Species: Natural Tourmaline

- Variety: Paraiba Tourmaline

Description

- Shape & Cutting Style: Cushion, Mixed Cut

- Measurements: 10.04 × 8.80 × 6.30 mm

- Carat Weight: 4.16 Carat

- Color: Bluish Green

- Transparency: Transparent

- Additional Grading Characteristics: Trade Color Name: Neon Green

Comments

“Paraiba is a gem variety of tourmaline containing copper (Cu) and manganese (Mn). The name is derived from the Brazilian locality Paraiba where this gemstone was first mined, however today it may come from a number of localities.”

“Paraiba tourmaline is commonly heated to improve its color. There is currently no scientific method available to determine whether this gemstone has been enhanced or not.”