Learning Library

Dumortierite Gemstone

A relatively unknown gemstone, but ideal for creating modern, contemporary designs.



First documented in 1881, Dumortierite was discovered near the Rhone River in France and is named after the French palaeontologist Eugene Dumortier (1803-1873).
Although normally an opaque blue colour (said in the trade to be the colour of blue jeans) the gem has also been found in brown, blue and sometimes a rare violet to pink colour.

Dumortierite can be misidentified as Sodalite, and Lapis Lazuli. However, it does not have the golden flecks of Pyrite seen in Lapis Lazuli or the white Calcite veins found in Sodalite. Measuring 7-8.5 on the Mohs Scale, it is ideal for setting in many different jewellery designs.

The gem is said to promote trust, courage, harmony and is believed to help people become more successful in business. I also read that for business people, Dumortierite possesses the power to help you get organised, to file your paperwork better and to help organise your business thought process. I think it’s about time I commissioned a piece for myself!

Very rarely you may come across Dumortierite Quartz. This is in fact a Rutile Quartz where the blue inclusions are actually thin strands of Dumortierite.

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The Blue Denim gem looks great in geometric designs.