brookite - rectangular step cut, Pakistanbrookite - rectangular step cut, Pakistan

Brookite Value, Price, and Jewelry Information

Brookite usually occurs in very dark colors, transparent only in small fragments. Cuttable crystals are exceedingly rare, making attractive faceted gems prized collector’s items.

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Brookite usually occurs in very dark colors, transparent only in small fragments. Cuttable crystals are exceedingly rare, making attractive faceted gems prized collector’s items.

brookite - rectangular step cut, Pakistan
Dark red-brown, 0.87-ct brookite, 9.3 x 4.2 mm, rectangular step cut, Pakistan. © The Gem Trader. Used with permission.

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Brookite Value

brookite crystal on quartz - Pakistan
Brookite crystal on quartz, Kharan, Balochistan, Pakistan. Photo by Géry Parent. Licensed under CC By-SA 3.0.

What is Brookite?

Brookite, anatase, and rutile are polymorphous minerals. They share the same chemical formula, TiO2(titanium dioxide), but have different crystal systems and other gemological properties.

Does Brookite Make a Good Jewelry Stone?

Of the gem-quality titanium dioxide polymorphs, brookites have the best wearability since they have indistinct cleavage. However, they still have a hardness of 5.5 to 6, which makes them somewhat susceptible to scratching. Use protective settings for jewelry wear and store these gems separately from harder stones to avoid contact scratches.

Although not a very rare mineral, brookite crystals typically form in thin tabular shapes. This makes cutting gemstones very difficult. Although brookites have dispersion that exceeds that of diamonds, their dark colors and possibly submetallic luster can mask their fire. Due to these factors, you're more likely to find faceted brookites in gem collections than jewelry collections.

emerald-cut brookite - Pakistan
Brownish red, emerald-cut brookite, 0.52-ct, 6.5 x 3.8 x 1.5 mm, Kharan, Pakistan. © ARK Rare Gems. Used with permission.

Brookite Varieties


A black, opaque, and bipyramidal brookite variety, arkansite occurs in the eastern Siberian region of Russia and Magnet Cove, Arkansas, USA.

Arkansite, Magnet Cove, Arkansas, USA, on display at the Mineralogical Museum, Bonn, Germany. Photo by Ra'ike. Licensed under CC By-SA 3.0.

"Platinum Quartz"

Some quartz specimens from Brazil contain striking, "insectile" inclusions of brookite blades and rutile needles. These have been marketed as "platinum quartz." The name most likely alludes to the metallic appearance of the inclusions, although they contain no platinum.

Called "dragonflies in quartz" in Brazil, some quartz crystals like this clear, polished specimen show spectacular insect-like inclusions of brookite. 5.2 x 2.8 x 2.8 cm. Diamantina, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil. © Rob Lavinsky, Used with permission.

Please note that so-called "platinum aura quartz" refers to possibly diffusion-treated quartz, not the included material.

Quartz has much greater wearability as a jewelry stone than brookite. A Brazilian quartz with brookite inclusions makes an excellent way to add this mineral to your jewelry collection.

brookite in quartz - oval cut, Brazil
Oval-cut Brazilian quartz with brookite inclusions, 30.45 cts, 20.0 x 17.0 x 12.4 mm. © ARK Rare Gems. Used with permission.

Identifying Brookites

Brookite has over the limit (OTL) refractive indices of 2.583-2.740.

This gem shares some properties with another rarely faceted mineral, rutile. These fellow polymorphs have overlapping ranges of color and refractive index (RI). Nevertheless, rutiles usually have uniaxial optic character while brookites have biaxial. Rutiles also have heavier specific gravity (SG) than brookites.

brookites - Russia
Inter-grown brownish red brookite blades, 3.6 x 2.3 x 0.2 cm, Dodo Mine, Puiva, Ural Mountains, Russia. © Rob Lavinsky, Used with permission.

Are There Any Synthetic Brookites?

Scientists have synthesized brookite crystals hydrothermally for various projects and commercial applications, including research into its photocatalytic properties (like its fellow polymorph, anatase). However, there's no known jewelry use for this lab-created material.

There are no known gem enhancements for brookites.

Where are Brookites Found?

Pakistan produces beautiful crystals as well as cuttable material.

Other notable sources include the following:

  • United States: Magnet Cove, Arkansas (contact metamorphic rocks); California; Maine; Somerville, Massachusetts; Ellenville, New York (hydrothermal deposits); North Carolina.
  • United Kingdom: Dartmoor, England; Wales.
  • Minas Gerais, Brazil; France; Russia; Tirol, Switzerland (typical Alpine deposits).
brookite crystal - Wales, United Kingdom
A rich brown brookite crystal on druzy quartz and limestone matrix, 5.8 x 4.6 x 2.7 cm, Prenteg, Tremadoc, Wales, United Kingdom. © Rob Lavinsky, Used with permission.

Stone Sizes

Transparent stones always weigh less than 1-2 carats. Larger stones are opaque.

How to Care for Brookite Gemstones

Clean brookites with a soft brush, mild detergent, and warm water. Avoid using mechanical cleaning systems. For more care recommendations, consult our gemstone jewelry cleaning guide.

Trillion-cut brookite, 0.19 cts, 4.18 mm. © Rob Lavinsky, Used with permission.

Joel E. Arem, Ph.D., FGA

Dr. Joel E. Arem has more than 60 years of experience in the world of gems and minerals. After obtaining his Ph.D. in Mineralogy from Harvard University, he has published numerous books that are still among the most widely used references and guidebooks on crystals, gems and minerals in the world.

Co-founder and President of numerous organizations, Dr. Arem has enjoyed a lifelong career in mineralogy and gemology. He has been a Smithsonian scientist and Curator, a consultant to many well-known companies and institutions, and a prolific author and speaker. Although his main activities have been as a gem cutter and dealer, his focus has always been education.

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