A natural Black Tourmaline specimen on feldspar matrix from the Zomba District of southern Malawi — a locality celebrated among mineral collectors for the quality and diversity of its alkaline pegmatite specimens.

Geological profile:

The tourmaline in this specimen is schorl — the iron-rich, black member of the tourmaline group — crystallised within the alkaline pegmatites of the Chilwa Alkaline Province. These pegmatites, hosted within nepheline syenite and granitic syenite intrusions of the Zomba Plateau, provide the precise geochemical conditions — particularly boron and iron availability — for schorl to form as well-defined prismatic crystals with the characteristic striated faces and vitreous to sub-metallic lustre the species is known for. The feldspar matrix — microcline or orthoclase — serves as the primary host mineral, its pale cream to white colouration creating sharp visual contrast against the jet-black tourmaline prisms.

Specimen highlights:

• Black tourmaline crystals displaying prismatic habit with clearly visible vertical striations — a diagnostic feature of natural tourmaline
• Feldspar matrix providing structural display context and strong colour contrast
• Completely natural — no treatments, polishing, or enhancement

Why collectors value Zomba Tourmaline on Feldspar:

• The Zomba Plateau pegmatites are part of the same alkaline complex that produces Mount Malosa's world-class aegirine — material from this geological province carries established collector recognition and provenance credibility
• Schorl from alkaline pegmatite environments displays crystal definition and lustre that distinguishes it from the massive, poorly formed tourmaline commonly found in granitic pegmatites elsewhere
• The tourmaline-feldspar combination preserves the original mineralogical relationship as it formed within the pegmatite — a geological context piece, not an isolated crystal
• A strong companion specimen for collectors already holding Malosa aegirine or Zomba smoky quartz, building a locality suite from one of Southern Africa's most mineralogically productive alkaline complexes

Specimen details: Natural Black Tourmaline (Schorl) on feldspar matrix. Each piece varies in crystal size, tourmaline density, and feldspar distribution. Sourced and verified for Zomba, Malawi origin. Photographs represent the actual specimen or specimen grade available.