They can deceive our visual system into seeing things that aren’t actually there or can lead our eyes to misinterpret ... Have you found the hidden cat? Check the image once more; you might ...
In such cases the cutter must orient the needles with care to produce a cat’s-eye.A chatoyant cabochon, weighing 21.22 ct and measuring 17.75 × 17.50 × 6.77 mm, was recently submitted to GIA’s Tokyo ...
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