History
Kyanite was first discovered in the 18th century by the mineralogist Abraham Gottlob Werner. The name kyanite comes from the Greek word "kyanos" which means blue, which is the most common color of this gemstone.
Varieties
Kyanite comes in a variety of colors including blue, green, yellow, orange, and colorless. The blue variety is the most common and popular.
Origin
Kyanite is found in many locations around the world, including the United States, Brazil, Switzerland, Russia, and Nepal. Most of the kyanite used for jewelry is sourced from Brazil, Nepal, and India.
Physical Properties
- Hardness: 4.5 - 7 on the Mohs scale
- Density: 3.53 - 3.69 g/cm³
- Cleavage: Perfect in one direction
- Fracture: Uneven to conchoidal
- Streak: White
- Luster: Vitreous to pearly
- Transparency: Transparent to translucent
- Crystal System: Triclinic
Optical Properties
- Refractive Index: 1.712 - 1.734
- Birefringence: 0.018 - 0.018
- Pleochroism: Strong, blue to colorless or green to colorless
Elementary Analysis
Kyanite is an aluminum silicate mineral with the chemical formula Al2SiO5.
Most Expensive Piece Selling Record
There is no official record of the most expensive kyanite selling price. It depends on various factors such as color, clarity, carat, and rarity.
Uses
Kyanite is used for various purposes, including:
- Fashion jewelry
- Industrial applications, such as refractory and ceramic materials
- Metaphysical healing and spiritual practices
No comments:
Post a Comment