Kyanite

Kyanite

Kyanite is a captivating aluminosilicate mineral renowned for its striking blue hues and unique anisotropic hardness. The name “Kyanite” is derived from the Greek word kyanos, meaning “deep blue,” reflecting its most common coloration.

Variety and Category

• Mineral Family: Nesosilicate
• Chemical Formula: Al₂SiO₅
• Crystal System: Triclinic
• Mohs Hardness: 4.5–5 parallel to the length of the crystal; 6.5–7 perpendicular to the length

Kyanite’s unique feature is its anisotropic hardness, meaning it has different hardness values in different crystallographic directions. This property requires skilled lapidary work to cut and shape the gemstone effectively.

Color and Value

Kyanite typically exhibits a range of colors, including:

• Blue: The most common and valued color, ranging from pale to deep sapphire-blue.
• Green: Less common, with hues from light to dark green.
• Colorless to White: Rare and less commonly used in jewelry.
• Gray, Yellow, Pink, and Black: Occasionally found, adding to the gemstone’s diversity.

There are several factors that influence the value of Kyanite:

• Color: Deep, saturated blue hues are the most prized.
• Clarity: Transparent stones with minimal inclusions command higher prices.
• Cut: Precision in cutting enhances the stone’s brilliance and color display.
• Carat Weight: Larger stones are rarer and thus more valuable.

Optical Properties

• Luster: Vitreous to pearly
• Refractive Index: 1.712 – 1.734
• Birefringence: 0.012 – 0.016
• Pleochroism: Trichroic; displays colorless to pale blue to deep blue
• Specific Gravity: 3.53 – 3.65

Kyanite’s strong pleochroism and vitreous luster contribute to its visual appeal, making it a favored choice among gem enthusiasts.

Common Cuts and Applications of Kyanite

Due to its variable hardness and perfect cleavage, jewelers typically cut Kyanite into shapes such as oval, round, and cushion cuts to maximize its brilliance and showcase its pleochroic properties. It is common to see the use of these stones in various types of jewelry, including rings, earrings, pendants, and bracelets. Protective settings are recommended to safeguard against potential cleavage.

Sri Lankan Uniqueness

Sri Lanka, historically known as Ceylon, is renowned for producing high-quality Kyanite gemstones. The country’s gem-rich regions yield Kyanite crystals celebrated for their exceptional clarity and vibrant colors. Sri Lankan Kyanite is esteemed in the global gemstone market for its superior quality and natural beauty.

At Luxiris Gems (PVT) Ltd., we take immense pride in offering authentic Sri Lankan Kyanite, each meticulously selected for its exceptional beauty and quality. Our commitment to ethical sourcing and excellence ensures that our clients receive gemstones that are not only stunning but also steeped in the rich heritage of Sri Lanka’s gemological legacy. Contact us to find your stone of dreams.