Rutilated Quartz

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Gemstones are usually treasured for their crystalline varieties that contain little or no inclusions. Some varieties, however, are favored because of their unique inclusions. One such variety is rutilated quartz. Striking in appearance, the thin, elongated red to golden rutile needles may form parallel to one another or have random distribution throughout the quartz. On rare occasions, needles may radiate in six different directions, creating a star-like pattern. Specimens exhibiting this pattern are the most highly prized of all.

Rutilated Quartz Polished
Rutilated Quartz Classification
Common Name Rutilated Quartz
Species Quartz
Rutilated Quartz Optical Properties
Transparency Transparent - Opaque
Dispersion Strength: Weak Fire Value: 0.013
Refractive Index 1.544-1.553
Tolerance:very constant
Birefringence 0.009
Optic Character Uniaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism None
Rutilated Quartz Characteristic Physical Properties
Hardness 7
Streak White
Specific Gravity 2.640-2.690 Typical:2.660
Toughness Good
Inclusions Rutilated quartz will have rutile inclusions and might contain liquid, two-phase and three-phase inclusions, negative crystals, minerals, needles and iron particles.
Luster Vitreous
Stability Good
Fracture Conchoidal
Cleavage None
Rutilated Quartz Chemistry & Crystallography
Chemical Name silicon dioxide (aka silica)
Chemical Formula SiO2
Crystal System Trigonal
Chemistry Classification Silicate

Rutilated Quartz Colors

  • Red Rutilated Quartz Red
  • Multi-color Rutilated Quartz Multi-color
  • Colorless Rutilated Quartz Colorless
  • Yellow Rutilated Quartz Yellow
  • Brown Rutilated Quartz Brown

Alternate Names

Sagenitic Quartz

Countries of Origin

Argentina; Pakistan; United States of America (the); Unknown; Sri Lanka; Russian Federation (the); Brazil; Madagascar; India

History

Sometimes you want the unusual... the distinctive... the unique. Rutilated quartz is all that and more. Although most stones are prized for their clarity, some are prized for their lack of it. Enter rutilated quartz. This stone has thin, elongated, red-to-golden rutile (needle-like inclusions). They may run parallel to one another or be randomly distributed within a stone; some even run in six directions to create a star. Rutilated quartz is waiting to become a star in your jewelry wardrobe. Don't make it wait.

Care

Like its sister stones, amethyst and ametrine, this quartz is a 7 on the Mohs scale of hardness. That makes it a very wearable stone. Wash in warm water; avoid harsh chemicals,

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Tim Matthews

Author

Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.