Talking about the bleaching enhancement, it is done on a tiger eye when it is too dark to be sold. In this case, although no bleach is used, nitric acid is used to lighten the color of the stone and create a more appealing color. Similarly, when you want a natural Tiger Eye Stone to showcase red tints, heat treatment is used and thus you can say that the red tiger eye is developed artificially. When the dyeing process is used, the color of the tiger’s eye stone becomes more saturated, or the color is changed altogether.
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