Dumortierite is a fibrous variably colored aluminium boro-silicate mineral, Al 7 BO 3 (SiO 4) 3 O 3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals .

Sep 7, 2024 · Chemically, dumortierite is a crystalline aluminum borosilicate, typically occurring in fibrous or columnar formations within igneous rocks such as granites, pegmatites, and syenites.

Named in honour of Eugène Dumortier (3 December 1801, Lyon, France – 13 August 1876, Lyon, France), palaeontologist who wrote 'Études Paléontologiques sur les dépôts jurassiques du Bassin du Rhône'. Closely related to holtite. Visit gemdat.org for …

Aug 3, 2015 · Dumortierite, which commonly occurs as a blue borosilicate mineral, is of gemological interest when present in quartzite, making an attractive blue ornamental material.

Dumortierite often forms in an attractive blue color and can be used as an ornamental stone. Though it is most commonly perceived as blue, especially in lapidary use, other colors include purple, pink, gray and brown. Dumortierite specimens are composed of dense fibers, giving them a tough durability.

Apr 3, 2019 · Dumortierite was first described in 1881 and takes its name from the French paleontologist Eugene Dumortier. It is a stone that is used not only in making jewelry but also for several industrial purposes. It is used to make ceramics and porcelain because it turns into a color of pure white when exposed to fire or heat.

Feb 18, 2014 · Dumortierite is a fibrous variably colored aluminium boro-silicate mineral, (Al,Fe 3+) 7 (SiO 4) 3 (BO 3)O 3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals.

Jul 1, 2024 · Dumortierite quartz is a unique variety of quartz that contains inclusions of dumortierite, a rare aluminum borosilicate mineral. This combination results in a stunning blue to violet-blue coloration within the quartz crystal.

Oct 9, 2022 · Dumortierite (pronounced doo-moar-teer-uh-rite) is a semi-precious gemstone named after French paleontologist Eugene Dumortier. The type of quartz containing dumortierite is sometimes called “Bahia Blue Quartz” or “Blue Moon Quartz.”

Dumortierite occurs in metamorphic rocks rich in aluminium. The finest grade material, which can be exceptionally beautiful, often features a mass of long, slender crystals embedded within clear, colourless quartz.