Chrysoberyl is a mineral in the gem world, of which there are three main gem varieties:

• Transparent Chrysoberyl that is usually found in yellowish green to green, yellow and shades of brown.
• "cat's eye", also known as cymophane. Microscopic needle-like inclusions reflect light along the center of the crystal, thus making it look like a living cat's eye! The colour ranges from a honey-brown to an apple green.
• The third is a rare and valuable gemstone that has the unique property of changing colour depending on the type of light that shines on it. In sunlight, it appears emerald green, while in artificial light it appears a violet-red.

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