Scheelite vs Willemite
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Scheelite
Scheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten and is also collected as a mineral specimen because crystals can show bright blue-white fluorescence under shortwave ultraviolet light. Natural scheelite may occur in white, yellow, or other pale colors, and its name commemorates the Swedish chemist Carl Wilhelm Scheele, whose work is assoc...
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Willemite
Willemite is a zinc silicate mineral with the chemical formula Zn2SiO4 and a minor source of zinc ore. It occurs in several colors and forms, but specimens from the Franklin and Sterling Hill zinc deposits in New Jersey are especially associated with bright green fluorescence under shortwave ultraviolet light. The mineral is named after William I of the Netherlands and is collected both for its mi...
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