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The Gemstone Dumortierite
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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. |
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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. |
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Dumortierite is a minor gemstone used mostly in cabochons and lapidary carvings.
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Dumortierite gemstones are natural and not treated or enhanced.
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Dumortierite sources include Brazil, Peru, Madagascar, Namibia, Austria, and the U.S. (California).
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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.
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Have a question about Dumortierite? Visit our Q&A Community and ask the experts!
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