DT Black Tourmaline

Size: 5x5x8 cms

Weight: 330 grams

Location: Namibia

Product Description:

A rare and exceptional mineral specimen featuring double terminated black tourmaline, a boron silicate mineral, showcasing a unique, doubly terminated crystal formation with a dense, opaque appearance.

Geological Information:

- Location: Namibia (notably in the Erongo Mountains and Namib Desert)
- Type: Black Tourmaline (Boron Silicate, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
- Formation: Pegmatitic and hydrothermal veins in granitic and metamorphic rocks
- Color: Black to dark brown
- Hardness: 7-7.5 on the Mohs scale
- Crystal System: Trigonal
- Formation Process: Magmatic and hydrothermal activity resulted in the formation of double terminated black tourmaline.
- Age: Cretaceous-Paleogene Era, approximately 145-25 million years old
- Occurrence: Found in extremely limited quantities, primarily in the Erongo Mountains and Namib Desert regions of Namibia.
- Distinctive Features: Double termination, indicating growth in a cavity or vug, allowing for crystal formation on both ends.

This detailed description highlights the natural beauty, unique features, and geological significance of Double Terminated Black Tourmaline from Namibia, showcasing its rarity and mineralogical importance.