Collection: Blue kyanite

Blue cyanite, also called disthene , is a fascinating mineral, prized both for its geological properties and for its aesthetic qualities in jewelry and lithotherapy.

🔹 Main Features

• Chemical formula : Al₂SiO₅ (aluminum silicate)

• Crystal system : triclinic

• Hardness : variable along the crystalline axis

  • 4 to 5 on the longitudinal axis

  • 6 to 7 on the perpendicular axis
    (a very unusual property)

• Color : intense blue to light blue, sometimes green, gray or colorless

• Luster : Vitreous to pearly

• Transparency : translucent to transparent

📍 Origin and deposits

Kyanite is found in aluminum-rich metamorphic rocks , such as schists and gneisses.
The main deposits are located:

• in Brazil

• in the United States

• in Switzerland

• in France (Massif Central, Alps)

• in Nepal (with specimens of a very intense blue)

• in India (often used in gemology)

💎 Uses

1. In jewelry

• Appreciated for its sapphire blue color

• Fragile: often mounted as a pendant or earrings rather than a ring

• Delicate size due to its variable hardness

2. In industry

• Used in the manufacture of refractory (heat-resistant) products: bricks, foundry molds, technical ceramics

3. In lithotherapy

• Brings calm and mental clarity

• Promotes communication, intuition

• Associated with the throat and third eye chakras

⚠️ Please note

• It can be confused with sapphire, but is much more fragile

• Sensitive to shock and chemicals