Dumortierite is a minor blue gemstone that usually forms as
inclusions in
Quartz. Its most common color is blue or grayish-blue, though pink and purple colors are also known. Dumortierite's durability, combined with a high hardness, would make this an ideal gemstone, but the lack of transparency and often
dull luster limit its use.
All About
Pure Dumortierite gemstones are rarely encountered. Most
lapidary-grade Dumortierite is dense blue
inclusions of Dumortierite within
Quartz. These gemstones are often called by the confusing term "Dumortierite Quartz", or may even be called "Blue Quartz". The inclusions can be present throughout the Quartz, or in splotches or zones, resulting in light and dark blue color zones.
The properties listed above are inherent to pure Dumortierite. However, since most Dumortierite gemstones are actually
Quartz with Dumortierite inclusions, the properties listed under Quartz are the more accurate gemstone reference.
Uses
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Dumortierite is a minor gemstone used mostly in
cabochons and
lapidary carvings.
Treatments & Enhancements
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Dumortierite gemstones are natural and not treated or enhanced.
Dumortierite Sources
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Dumortierite sources include Brazil, Peru, Madagascar, Namibia, Austria, and the U.S. (California).
Similar Gemstones
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Dumortierite has a greater
hardness than
Lapis Lazuli and
Sodalite, and usually lacks the white veins often present in these two gemstones.