Black and Green Tourmaline
A beautiful protective rock!

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Black Tourmaline

A complex silicate of boron and aluminum, whose composition varies widely because of substitutions. Black (schorl), blue (indicolite), pink and red (rubellite), brown (dravite), green, multicolored, rarely white; vitreous; streak white. Hexagonal, usually short to long prismatic crystals that commonly have a rounded triangular cross section, striated lengthwise; also radiating, columnar, compact. Tourmaline is harder than apatite and further distinguished from apatite and beryl by striations. Tourmaline forms in igneous and metamorphic rocks and veins. It occurs with lepidolite, microcline, and spodumene in granite pegmatites and others. Tourmaline is widely used as a semiprecious gemstone.
Even though tourmaline has been known since antiquity in the Mediterranean region, the Dutch imported it only in 1703 from Sri Lanka to Western and Central Europe. They gave the new gems a Sinhalese name, Turamali, which is thought to mean "stone with mixed colors."
There are many varieties recognized in the trade today.

Metaphysical Properties: Deflects and repels negative energy, especially psychic attack. Protects against microwaves, radiation, "spells," and ill-wishing. Grounds spiritual energy, increases physical vitality. Defends against debilitating disease, strengthens immune system. Treats dyslexia and arthritis. Earth chakra.