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Labradoriteis a type of feldspar mineral that has a chemical formula of (Ca,Na)(Al,Si)4O8123. It is named after the Labrador peninsula in Canada, where it was first discovered. Labradorite can display an iridescent effect called labradorescence, which is caused by the reflection of light from thin layers of minerals in its structure. Labradorite is usually found in igneous rocks such as basalt and gabbro, as well as in metamorphic rocks and sediments. It has a triclinic crystal system and a pinacoidal habit. It can have various colors, such as gray, white, green, blue, or brown. (source: Wikipedia) Photos by Michael Marcotte Return to List Back to Michael's Hobbies page Back to Michael Marcotte's HomePage