Large, 3.7" Terminated Black Tourmaline (Schorl) Crystal - Madagascar

This is a large and beautiful black tourmaline (schorl) crystal from Sahatany Valley in Madagascar. It has beautiful, non-metallic luster, a natural termination and striations that run along the length of the crystal.

Schorl, also known as "black tourmaline" or "black schorl", is a black form of tourmaline that often occurs as lustrous prismatic crystals. The crystals can be stubby or elongated and typically feature lengthwise striations. Many schorl crystals have flattened pyramidal terminations. They can also form in radiating, columnar, and stalactitic aggregations, as well as small, needle-like inclusions within quartz (tourmalinated quartz) and in massive form.

Schorl is a basic sodium iron aluminum boro-silicate with the generic chemical formula NaFe2 + 3Al6(BO3)3Si6O18(OH)4 . It has been used for everything from jewelry to piezoelectric guitar pickups.

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DETAILS
SPECIES
Tourmaline var. Schorl
LOCATION
Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar
SIZE
3.7" wide
CATEGORY
ITEM
#172198