1.7" Brown Dravite Tourmaline Crystal - Western Australia

This is a beautiful double-terminated, brown dravite tourmaline crystal cluster that's associated with small amounts of mica, indicated by the lustrous, plate-like crystal formations found within the cavity along one face of the dravite crystal. This crystal was collected from the Upper Gascoyne River of Western Australia.

Dravite, also known as "brown tourmaline," is composed of sodium, magnesium, aluminum, and boro-silicate, with the chemical formula of NaMg3Al6(BO3)3Si6O18(OH)3F. Dravite is a subclass of tourmaline, which along with schorl tourmaline and uvite (also subclasses of tourmaline), form into a prismatic/columnar formation.

This prismatic structure can be seen on this dravite specimen, where one side shows its prismatic shape, and the other rough side shows where it grew against another mineral.
DETAILS
SPECIES
Tourmaline var. Dravite & Mica
LOCATION
Yinnietharra Station, Upper Gascoyne River, Western Australia
SIZE
1.7"x1.15"
CATEGORY
SUB CATEGORY
ITEM
#95418