Rock Identifier
Rutilated Quartz (Quartz (SiO2) with Rutile (TiO2) inclusions) — Mineral
Mineral

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Hardness: 7 on Mohs scale; Color: Clear to smoky quartz matrix with brown, reddish-brown, or dark needle-like inclusions; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: Approximately 2.65

Hardness
7 on Mohs scale
Luster
Vitreous (glassy)
Identified More mineral

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to smoky quartz matrix with brown, reddish-brown, or dark needle-like inclusions; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: Approximately 2.65

Formation & geological history

Rutilated Quartz forms hydrothermally in igneous and metamorphic rocks. As quartz crystals grow in silica-rich solutions, microscopic needles of rutile (a titanium dioxide mineral) are simultaneously incorporated into the growing quartz matrix. The exact geological age varies depending on the specific deposit, but it generally forms over millions of years alongside the host rock.

Uses & applications

Predominantly used in jewelry, cabochons, and ornamental carvings due to its unique and attractive inclusions. It is also collected by mineral enthusiasts. While quartz itself has industrial uses, rutilated quartz is valued specifically for its aesthetic qualities rather than industrial applications.

Geological facts

Rutilated Quartz is highly valued in metaphysical communities for its perceived energetic properties, believed to amplify thoughts and energies. It is sometimes called 'Venus Hair Stone' due to the fine, hair-like inclusions. The quality and value of Rutilated Quartz are often judged by the clarity of the quartz and the density, arrangement, and color of the rutile inclusions.

Field identification & locations

In the field, Rutilated Quartz is identified by its transparent to translucent quartz host material containing distinct, often golden, copper-red, or black needle-like inclusions. These inclusions can be dense, sparse, parallel, or randomly oriented. It is commonly found in Brazil, Australia, Kazakhstan, Norway, and the United States (e.g., North Carolina). Tips for collectors include looking for clear quartz with well-formed, aesthetically pleasing rutile needles without significant cloudiness or fractures.