Moonstone: With its ghostly glow, this feldspar stone almost seems magical. High-quality rainbow moonstone is usually chatoyant and sometimes displays a strong cat's eye. The floating-light phenomenon and sheen of moonstone are called adularescence or schiller. The light is scattered by alternating layers of two kinds of feldspar and produces a misty luster. Incipient cleavage cracks often are visible inside the gemstone. Rainbow moonstone is a close relative of labradorite. Moonstone is the birthstone for June in Europe, and in the United States it shares that distinction with alexandrite and pearl. Color Banded Rainbow Moonstone is strung in an ombre pattern, with darker gray moonstone beads at the ends, fading to lighter gray and white beads, then moving into peach, with golden moonstone towards the center.
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