Watermelon Tourmaline from Minas Gerais - Brazil
Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gem comes in a wide variety of colors. Crystals may be green at one end and pink at the other, or green on the outside and pink inside; this type is called watermelon tourmaline. Some forms of tourmaline are dichroic, in that they change color when viewed from different directions.
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Photo credit: © Phil Degginger / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: bi-colored, boron, brazil, crystal, crystals, geology, gerais, group, metamorphic, minas, mineral, minerals, paraiba, pariba, pegmatites, rock, rocks, silicate, specimen, specimens, tourmaline, watermelon
