Cat’s eye stone is often referred to as the “noble gemstone” by people. It is one of the five precious high-end gemstones in the world, along with the transformation stone. Maoyan stone is mainly produced in gas formed hydrothermal deposits and pegmatite veins. The most famous cat eye stones in the world are found in the southwestern regions of Sri Lanka, such as Tranabura and Gaul. Cat eye stones have also been discovered in countries such as Brazil and Russia, but they are very rare.
identify
The identification of cat eye gemstones is mainly based on refractive index, density, hardness, inclusions, and other characteristics. The color of most cat eye gemstones is gray brown and semi transparent, and there are also many cat eye gemstones with similar refractive indices. At the same time, because cat eye gemstones are cut into curved shapes, the refractive index itself is only an approximate value. If the gemstone is already set, its density cannot be directly measured, which brings difficulties to accurately distinguish different cat eye gemstones.
Cat’s eye stone is one of the important variants of the emerald mineral family. The hardness is 8.5 degrees, second only to diamonds and red and blue sapphires. Its colors are mostly honey yellow, yellow brown, yellow green, green white, coffee, etc., all of which have a distinct golden hue. Its Chinese name is also derived from this.
