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Pearl, alexandrite and moonstone are the three birthstones for June. Learn about their history and where these three June birthstones can be foun...

Opal, labradorite and moonstone form in microscopic layers of material that are successively stacked upon each other, giving rise to phenomena based on these unique structures. 

Moonstone can come in a variety of colors, including colorless, green, orange, gray and brown. The most valuable moonstones are colorless with an...

The definition of a phenomenon as “an object or aspect known through the senses,” according to Webster’s dictionary, might explain why some gemst...

This orthoclase feldspar moonstone has a billowy blue sheen because of adularescence, a phenomenon caused by the way the gem's structure scatters light.