Rough Black Tourmaline Natural Schorl Crystal Brazil Raw Healing Mineral Specimen with Certificate of Authenticity

Description

Rough Black Tourmaline from Brazil – Genuine Natural Schorl Mineral Specimen

This Rough Black Tourmaline crystal from Brazil is a high-quality natural specimen selected for its strong structure, deep colour, and authentic raw formation. The photographs show the exact piece you will receive, allowing you to appreciate its natural texture and features before purchase. As with all of our minerals, this specimen is 100% genuine and comes with a Certificate of Authenticity. Brazilian Black Tourmaline, also known as schorl, is one of the most recognisable and geologically significant forms of tourmaline, valued for its durability, crystal habit, and rich black coloration.

Geological Background and Formation of Black Tourmaline

Black Tourmaline (schorl) is a complex borosilicate mineral rich in iron, which gives it its characteristic deep black colour. It forms in a variety of geological environments but is most commonly associated with granitic pegmatites and metamorphic rocks such as schist and gneiss. These environments develop when mineral-rich fluids cool slowly within fractures and cavities of the Earth’s crust, allowing tourmaline to crystallise over long geological periods.

Brazil is one of the world’s most important sources of tourmaline, its vast pegmatite fields providing ideal conditions for the mineral to grow. These regions, shaped by ancient volcanic and tectonic activity, offer the perfect balance of pressure, temperature, and chemical composition required for the formation of well-developed tourmaline crystals. The combination of boron-rich fluids and iron-bearing host rocks results in the formation of dense, stable schorl crystals with a strong internal lattice structure.

Crystal Habit, Structure, and Natural Features

Black Tourmaline forms in the trigonal crystal system, typically developing as long, prismatic crystals with pronounced vertical striations. These parallel grooves, which run the length of the crystal, are one of schorl’s defining visual features. Rough specimens retain these natural ridges and striated surfaces, giving each piece a distinctive texture and appearance.

This raw Brazilian tourmaline shows the classic deep, opaque black coloration that reflects its high iron content. In natural light, subtle sheens may appear along the ridges, highlighting the crystal’s strong internal alignment. The structure may also include minor natural fractures, matrix attachments, or internal mineral inclusions—authentic features that reveal its formation history and geological origin.

Rough tourmaline specimens like this one display an unpolished, earthy character, preserving the original shapes, edges, and growth patterns created during crystallisation. These natural features make every piece truly unique.

Origin and Mineralogical Significance of Brazilian Schorl

Brazil’s pegmatite regions are world-renowned for producing exceptional tourmaline specimens. These geological environments provide the high-temperature, mineral-rich conditions required for large, stable crystals to form. Black Tourmaline found in these formations is particularly valued for its strong physical integrity, well-defined crystal structure, and consistent coloration.

Schorl is the most common variety of tourmaline, yet high-quality rough specimens from reliable regions remain sought after due to their geological importance and their ability to display clear mineralogical features. Its presence often indicates boron-rich hydrothermal activity and provides insights into the chemical evolution of the surrounding rock.

Authenticity and What You Receive

You will receive the exact Rough Black Tourmaline specimen shown in the images, with full sizing visible in the photos for accuracy. Each piece is selected for its natural form, crystal integrity, and aesthetic raw structure. Every specimen includes a Certificate of Authenticity confirming it as a genuine natural schorl crystal from Brazil.

This rough Black Tourmaline is ideal for mineral collectors, display, study, or anyone who appreciates natural geological specimens formed over millions of years within Earth’s ancient pegmatite environments.