Oval cabochon of quartz with black rutile inclusions, 16 × 13 × 4 mm. The black rutile needles run through the quartz like suspended capillaries: fine, parallel in some areas, diverging in others. Against a transparent to milky white quartz background, the contrast is absolute.
Item Specifications
| Mineral |
Quartz with black rutile inclusions (titanium dioxide) |
| Dimensions |
16 × 13 × 4 mm |
| Shape and Back |
Oval; flat back |
| Finish |
Mirror polish |
| Hardness |
7 Mohs — we recommend a closed bezel setting |
| Origin |
Material acquired from a wholesale lapidary market |
| Treatment |
Untreated |
| Type of Item |
Unique piece |
This specific piece
The rutile needles in this piece form a free-flowing distribution pattern: some run parallel in groups of two or three, others intersect at acute angles, and still others terminate abruptly within the crystal.
The oval cut was the lapidary choice to frame the rutile distribution in a classic format that doesn't compete with the inclusions: the observer's eye is drawn directly to the needle pattern.
How rutile needles form in quartz
Rutile is a mineral that crystallizes at high temperatures in magmatic and metamorphic rocks. When quartz forms under the same conditions or in later generations, it can grow around pre-existing rutile crystals, encapsulating them.
Suitable mounting options
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Bezel setting (925 silver) — The 16 × 13 mm format with only 4 mm profile facilitates a low-wall bezel in 925 silver. The black rutile needles in quartz set in bright silver create an elegant combination without excess.
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Statement rings / Pendants with silver mounting — The black needles against a light background work in any mounting configuration. For a ring: a closed bezel to protect the edges.
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Wire wrap — The flat 4 mm profile allows for a clean wire wrap with silver or copper in 20-22 gauge.
Rutilated quartz in lapidary tradition
Quartz with rutile inclusions is known in the international lapidary trade by names such as "Rutilated Quartz" or "Venus hair stone". It has been prized in artisan jewelry since the 18th century, especially in central Europe, where golden inclusions were more common than black ones.
In crystal tradition, black rutilated quartz is associated with clarity emerging from contrast: the dark within the transparent as a metaphor for integrating complexities without losing sight of the bigger picture.
The symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice.
How to recognize genuine rutilated quartz
Genuine rutile needles have defined edges and a characteristic visual metallic sheen: under magnification, the surface of the needles has a distinct luster compared to the surrounding quartz.
Frequently asked questions
Where does the material come from?
Material acquired from a wholesale lapidary market; the exact mine location is not documented. The main producers of rutilated quartz are Brazil, Madagascar, and parts of East Africa.
Is the material treated?
No detectable treatment. Rutile needles are natural mineral inclusions. Statement based on lapidary observation; no formal gemological certification.
Is black rutile different from golden rutile?
Yes. The color of rutile needles varies according to their composition: rutile with high iron content in its crystal lattice is black; with less iron and some niobium, it is golden or honey-colored. Both are natural, untreated minerals. The difference is purely compositional.
What makes this piece unique?
The distribution pattern of the rutile needles—their orientation, density, and length—is unrepeatable. No two cabochons have an identical arrangement of needles.
Are the dimensions exact?
16 × 13 × 4 mm with a tolerance of ±0.5 mm. Hand-cut, not industrially calibrated.
How to care for it?
Clean with warm water and a soft brush. Dry immediately. Store separately from abrasive materials. More information in our jewelry care guide.
More quartz with inclusions: lapidary collection. See also: all cabochons.
