Kyanite
Buyer’s Guide

Colour

Colour is the most important value factor for kyanite. The most desirable stones display a vivid, uniform blue without grey or greenish undertones. High-quality kyanite typically shows:

• Deep, vibrant blue or blue-green hues
• Even colour distribution throughout the stone
• Brightness and attractive sheen

Paler or unevenly coloured stones are less valuable. The finest specimens show strong saturation with a velvety appearance.

Clarity

Kyanite often contains minor inclusions, but gem-quality stones are largely eye-clean. High-value stones display:

• Minimal visible inclusions
• Smooth internal texture without fractures
• Strong light transmission and brilliance

Cutting orientation and angle are important to minimise visible striations or imperfections.

Cut

Cut greatly influences kyanite’s visual appeal. Well-cut stones maximise colour, light reflection and symmetry. Key cut considerations include:

• Proper alignment along the crystal’s hardness axis
• Balanced proportions and depth
• Smooth polish to enhance lustre

Kyanite is commonly faceted into oval, cushion or custom shapes. Bladed crystals are sometimes fashioned as cabochons to display colour evenly.

Carat Weight

Larger kyanite stones are rare and generally command higher prices, particularly if colour and clarity are strong.
When comparing stones:

• Smaller stones with superior colour may surpass larger, lower-quality specimens
• Evenly coloured medium-to-large stones are highly sought after
• Exceptional clarity in larger kyanites adds significant value