labradorite
/ˌlabrəˈdɔːrʌɪt
/noun [mass noun]
A mineral of the plagioclase feldspar group, found in many igneous rocks.Tubular voids have not been observed with a hand lens in labradorite crystals less than 0.8 cm long....
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- We have this labradorite necklace available in two bead diameter sizes.
Origin
Early 19th century: from Labrador Peninsula, where it was found, + -ite1.