Kyanite and some of its properties.
Kyanite is an attractive mineral infrequently used as a gemstone in jewellery. Its brittleness means that extreme care must be taken when handling, cutting and polishing.
Kyanite has perfect cleavage in one direction. Its name derives from the Greek kyanos, meaning “blue”. (It is used in the production of spark plugs).
Kyanite is unique among gems in that it has a wide variation of hardness across the same crystal. This is known as being disthene.
In jewellery, the most prized kyanites are transparent and deep cornflower blue, pale blue or bluish-green in colour. It can often be mistaken for Sapphire or Aquamarine. It is often fashioned into long rectangle and step cuts or into oval carbochons.
Its Royal blues capture the imagination and the finest examples of this gemstone have clarity that will delight you. Only the finest Ceylon Sapphire could compare with the delights and depths of this beautiful Kyanite.
Kyanite is probably one of the most underestimated gemstones in the industry. In the next decade or two, it will possibly become one of the most sought-after gems on the planet.
Its clear, strong blue to bluish-green colour has placed Kyanite in direct association with loyalty, serenity, calmness and innovation and dreams. It is said to be effective on the throat and third eye chakras.
Mainly set in rings, earrings and pendants, (see pictures) It is an ideal gemstone for self adornment. It has a colour, in its true blue form, very similar to Sapphire and gems extracted from recent mines in Tibet and Nepal are comparable to the very finest Kashmir Sapphires.
This gemstone is mined at very high altitudes, and is now incredibly rare, and pieces over 3ct are almost unheard of.
This precious stone is also mined in Brazil and the USA.
This is another of those gemstones that should seriously be looked at for adding to One’s collection, not only because it is quite scarce and could be a good investment, but mainly because it is such a beautiful gemstone to wear.
Kyanite has two hardness values: between 4.5 and 5 and then 7. The lower value runs along the crystal’s length , parallel to the direction of the cleavage. The harder value runs across the crystals width, perpendicular to the cleavage.
Lapidaries working with this gem have to constantly adjust their pressure and speed. This is so that they can make progress grinding the harder areas and avoid overcutting the softer areas. Kyanite has a moderate birefringence (double refraction) and is strongly trichrioc, showing colorless, violet and cobalt blue.
Although it is not a recognised birthstone, it is associated with the Zodiac signs of Aries, Taurus and Libra.
Occasionlly, “Green Kyanite” is found and is then known as Emerald Kyanite. Its ravishing appearance resembles the Zambian Emerald and is valued as a real treasure by gem collectors.
Kyanite captures an image of the deepest underwater world that only daring divers can experience. The serenity of deep blue awoken by white beaming moments that awaken the pure blue as daylight can stream through, highlighting the beautiful blue purity.