Kyanite market statistics

Kyanite

Color: blue, greenish blue, yellow, pink, colorless Hardness: bi-directional, 4.5 - 7 Refractive index: 1.71 - 1.74 Density: 3.53 - 3.70 Chemical composition: Al2O[SiO4] Crystal structure: triclinic Origins: Brazil, USA, Switzerland, Kenya, Mozambique, Russia, Nepal, India, Burma. The hardness of a kyanite varies depending on differing crystal axial directions from 4.5 to 7. The best stones are intense blue and have a uniform color throughout the crystal.

Kyanite 9.10 cts. Published under permission: Miguel Angel Lopez

The figures are based on Gemval's aggregated valuation statistics for the retail market. Irrelevant, controversial or repeat data are excluded from our analysis wherever possible. The figures are updated monthly.

Weight distribution for Kyanite

Occurrence is represented in % for different weight categories.

Price distribution for Kyanite

Occurrence is represented in % for different value intervals.

Clarity distribution for Kyanite

Occurrence is represented in % for different clarity grades.

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