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labradorite: the gem plagioclase feldspar with play-of-color!
that is often used as a gemstone. author: hobart m. king , ph.d., gia graduate gemologist labradorite: photograph of labradorite gemstones exhibiting a beautiful labradorescent play of iridescent colors. photo by joanna-palys copyright istockphoto. labradorite: a specimen of labradorite feldspar rough...
https://geology.com/gemstones/labradorite/