The chatoyancy of an 8 carat cat's eye stone is what makes it so fascinating. The gemstone contains tiny, needle-like inclusions that cause this optical effect. A single, focused band of light appears over the cabochon-cut stone (a smooth, polished dome) as a result of light interaction with these inclusions. The value of an 8 carat cats eye stone is largely dependent on the quality of the chatoyancy. The ideal light band is thought to be a powerful, centred band.
The Eight Carat Cat's Eye Stone: Its Various Facets
Other minerals can also show this effect, albeit chrysoberyl is the most well-known kind to do so. Chrysoberyl is a common material for an 8 carat cat's eye stone, although it can also be made of quartz, apatite, or even scapolite. Every substance has a different spectrum of hues and brightness. Whereas quartz cat's eye, sometimes known as "aventurine," exhibits a mesmerising green with glittering specks, chrysoberyl cat's eye stones lean more towards a golden or greenish colour. Scapolite cat's eye is distinguished by its chatoyancy over a milky white foundation, while apatite cat's eye stones can have hues ranging from yellow to green to blue.
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