Collection: Dumortierite

Dumortierite is a relatively rare mineral, valued as much for its aesthetic properties as for its uses in lithotherapy and industry.

🔹 Dumortierite Identity Card

• Name : Dumortierite

• Group : Silicates (more precisely, aluminum borosilicate)

• Chemical formula : Al₇BO₃(SiO₄)₃O₃

• Crystal system : Orthorhombic

• Hardness : 7 – 8 on the Mohs scale

• Colors : Blue (most common), purple, reddish-brown, greenish, pinkish

• Luster : Vitreous to silky

• Transparency : Translucent to opaque

🌍 Origin and deposits

Dumortierite is found in aluminum-rich metamorphic rocks , often associated with minerals such as sillimanite, andalusite, or quartz.

Main deposits :

• Brazil

• Madagascar

• United States (Arizona, Nevada)

• France (notably in Bourg-de-Péage in the Drôme, where it was discovered)

• Canada

• Sri Lanka

💎 Uses

1. Ornament and jewelry

• Often cut into cabochons or pearls.

• Sometimes confused with lapis lazuli because of its intense blue color.

2. Porcelain

• Used in industry to strengthen porcelain, thanks to its aluminum content.

3. Lithotherapy

Dumortierite is known for its virtues on the mind and concentration :

• Would promote clarity of mind , discipline and organization .

• Would be helpful in times of stress or anxiety .

• Associated with the third eye chakra , it would stimulate intuition and spiritual perception.

🧠 Interesting fact

Some specimens of blue quartz actually get their bluish hue from the presence of microscopic inclusions of dumortierite!