1.45" Schorl & Muscovite - Erongo Mountains

Here is a beautiful schorl & muscovite from the Erongo Mountains in Namibia. Although it has broken away from the original host rock, the crystal is in overall good shape.

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.


Muscovite is a phyllosilicate mineral of aluminium and potassium. It has a highly perfect basal cleavage yielding remarkably thin laminæ which are often highly elastic.


DETAILS
SPECIES
Schorl & Muscovite
LOCATION
Erongo Mountains, Namibia
SIZE
1.45x1.41x1.28"
CATEGORY
ITEM
#31897