Round quartz cabochons with black rutile inclusions, rose cut, 6 mm in diameter.
Item Details
| Mineral |
Quartz with black rutile inclusions (SiO2 with black tourmaline needles or titanium rutile) |
| Dimensions |
6 mm diameter x approx. 3 mm height (rose cut) |
| Shape and Back |
Round faceted, rose cut (faceted crown + flat back) |
| Finish |
Polished faceted |
| Hardness |
7 Mohs — we recommend bezel setting or silver 925 claw setting |
| Origin |
Material acquired in wholesale lapidary market |
| Treatment |
No treatment |
| Item Type |
Commercial stock; needle pattern varies between units |
This specific piece
The dark needles vary in orientation, density, and length among units in the batch.
The rose cut format — faceted crown with multiple triangular facets on a flat back — keeps the transparency of the quartz visible from above while refracting light at multiple angles on the internal needles.
How inclusions form in quartz
Quartz is one of the most common minerals in the Earth's crust and one of the most hospitable to inclusions.
What setting works for this
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Bezel setting in 925 silver — The bezel runs along the entire perimeter of the 6 mm, protecting the edge of the rose cut, the most vulnerable area to impacts. Oxidized or polished 925 silver contrasts well with the black of the needles.
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Open claw setting for ring or earring — A 6 mm claw setting allows the flat back to be seen and lets light pass through the faceted crown, maximizing the optical effect of the inclusions without covering the stone.
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Wire wrap over flat back — The flat back of the rose cut makes direct wrapping easy without the stone rolling. An alternative for those who work with silver wire wrapping without soldering.
Rutilated quartz in lapidary tradition
Rutilated quartz has been used in jewelry since Roman antiquity, where it was called sagitta Veneris ("arrow of Venus") due to the golden needles that resembled arrows. Darker varieties — with black inclusions instead of golden ones — have gained popularity in the contemporary lapidary market, especially in designer jewelry and minimalist statement jewelry. Its geological aesthetic, which shows the interior of a crystal rather than its surface, connects with the trend that prioritizes material authenticity over uniformity. In crystal tradition, black rutilated quartz is associated with protection and the transformation of dense energies: the stone of those facing change.
The symbolic associations attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice.
How to recognize authentic rutilated quartz
Genuine rutilated quartz shows linear and straight inclusions, with its own luster (metallic in the case of rutile, matte in tourmaline).
Frequently Asked Questions
Is "black rutile" really rutile or are they tourmaline inclusions?
In the lapidary market, the term "black rutile" applies to both titanium rutile needles in the black phase and black tourmaline (schorl) inclusions.
Is it suitable for daily ring wear?
With Mohs 7, quartz resists everyday scratching. However, the rose cut has facets that can chip with direct impacts.
Has the quartz in this batch been treated?
No detectable treatment. Statement based on lapidary observation; the piece does not include formal gemological certification.
Why does the needle pattern vary so much between pieces from the same batch?
Inclusions form during quartz crystallization, a process that depends on temperature, pressure, and local fluid concentration.
What is the dimension tolerance?
±0.5 mm in diameter and height. These are calibrated commercial lapidary stock pieces; variation is minimal but always present in natural material.
How to care for it?
Clean with a soft cloth and warm water with mild soap. Avoid ultrasound and steam, which can fracture internal inclusions. See our complete guide on jewelry care.
See also our collection of cabochons and silver smithing materials.
