This individually documented Natural Black Rutilated Quartz weighs 3.380 carats and has been fashioned into a distinctive hexagonal mixed cut. Its transparent Clear Quartz host contains prominent black Rutile inclusions, creating a striking contrast between the near-colourless crystal and the dark needle-like mineral structures enclosed within it.
Measuring approximately 9.8 × 9.7 × 9.7 mm across the hexagonal outline with a depth of 5.4 mm, the gemstone presents a strong geometric face-up appearance. The mixed faceting combines the precision of a hexagonal design with the naturally irregular inclusion pattern of the Rutile, giving the stone a highly individual visual identity.
The Quartz host remains transparent despite the abundant inclusions, allowing the internal Rutile pattern to remain clearly visible from multiple viewing angles. The dark needles create a naturally graphic structure within the stone and vary in orientation, density and distribution throughout the crystal.
Natural Black Rutile Inclusions
Rutilated Quartz consists of natural Quartz containing crystals of Rutile, a titanium dioxide mineral (TiO₂). Rutile commonly develops as fine elongated or acicular crystals and may occur in golden, reddish, silvery, brown or black appearances.
In this specimen, the Rutile appears predominantly black, forming clearly defined needle-like inclusions within the transparent Quartz. The exact configuration is unique to this individual gemstone and reflects the mineralogical conditions present during its natural formation.
The facet arrangement allows light to interact with both the polished external surfaces and the enclosed Rutile structures. Depending on illumination and viewing angle, individual inclusions may display subtle reflective or submetallic highlights while remaining clearly contrasted against the transparent host material.
The polished Quartz itself displays a characteristic vitreous luster, while the Rutile inclusions may show submetallic to adamantine reflections. The darker appearance of the inclusions should therefore be distinguished from the surface luster of the Quartz host.
As a naturally included gemstone, internal growth features, fine fissures and minor surface-reaching characteristics may occur, particularly around or alongside the Rutile inclusions. These features contribute to the specimen’s natural identity and should be regarded as part of its individual mineralogical character.
Treatment information for this individual gemstone should be interpreted according to its specimen-specific documentation. Heating may be used with some included Quartz material for stabilisation, but this should only be attributed to this specimen when specifically documented.
Natural Gems Belgium evaluates every gemstone individually for its colour or inclusion character, cutting quality, optical presentation and overall visual appeal. Structured gemmological properties and the individual NGB Grading Report are presented separately in the dedicated Technical Data and grading sections.
With its 3.380 ct weight, transparent Quartz host, geometric hexagonal faceting and distinctive network of black Rutile inclusions, this gemstone combines natural mineral architecture with an individual faceted presentation. The exact gemstone shown in the accompanying photographs is the specimen supplied.
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