Tourmaline

Description

The tourmaline is an aluminum and alkali borosilicate complex , with iron, magnesium and other cations. Its range of colors is the largest in the mineral world
General Physical properties: hardness from 7 to 7.5 - density from 3.02 to 3.20 g/cm3 - refractive indexes about 1.62 and 1.64 with birefraction rather high

Colorless crystals with pink termination are termed "TURKISH HEAD"

- Weight: 3.38 Kt

- Size 11 x 7.35 x 4.50 mm

- Cut: table and steps with rectangular shape and sharp edges

- Color: from colorless to intense pink

- Purity: slightly included

- Treatments: none

- Origin: Mozambico