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Smithsonian National Museum of Natural History
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Kyanite

Oval-cut dark blue kyanite weighing 5.87 ct.
Photo by Ken Larsen. Click to zoom.
Catalog Number NMNH G10565-00
Locality Nepal
Weight 5.87 ct

Gift of Dudley Blauwet in 2008.

Kyanite is a naturally occurring aluminum silicate mineral that typically forms as bladed crystals, and occasionally it occurs as radiating masses of crystals. The name kyanite is derived from the Greek word kyanos which means “blue.” Gem quality kyanite has a royal blue color similar to fine sapphire. This material is highly prized by those who cut gemstones. Kyanite can be cut en cabochon, faceted, or fashioned into beads, however its variability in hardness and color zoning can make it difficult to fashion and facet. Transparent intense blue kyanite is beautiful and is considered to be an exotic gemstone because it is not often seen in jewelry. Kyanite is predominately found in shades of blue and green, but it can also be yellow, white and orange. This 5.87ct gem is an intense deep blue color and the largest and finest kyanite from Nepal in the National Gem Collection.


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