1.9" Terminated Black Tourmaline (Schorl) Crystal Cluster - Madagascar

This is a beautiful black tourmaline (schorl) crystal cluster from Sahatany Valley in Madagascar. The crystals have non-metallic luster, natural terminations and striations that run along the length of the crystals.

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
1.9" long
CATEGORY
ITEM
#200431