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

This is a large 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 striations that run along the length of the crystal. 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 and the generic chemical formula is NaFe2 + 3Al6(BO3)3Si6O18(OH)4 . It has been used for everything from jewelry to piezoelectric guitar pickups.

FOR SALE
$29
DETAILS
SPECIES
Tourmaline var. Schorl
LOCATION
Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar
SIZE
2.6" wide
CATEGORY
ITEM
#174132